Send IDs through exec_api_call as a regular param not a block

When sending them through an array in a block, the client calls the action
on the collection with an array of IDs.  Unfortunately this returns an
Array of ManageIQ::API::Client::ActionResults and Arrays aren't currently
an expected response for this caller, so it will raise:
"Got unexpected API result object Array"

Rather than dealing with the confusion of calling .first on the array,
allow an ID to be passed in.

https://bugzilla.redhat.com/show_bug.cgi?id=1526009

app/models/mixins/inter_region_api_method_relay.rb

@@ -29,9 +29,7 @@ def api_relay_method(method, action = method)
         if in_current_region?
           super(*meth_args, &meth_block)
         else
-          InterRegionApiMethodRelay.exec_api_call(region_number, collection_name, action, api_args) do
-            [{:id => id}]
-          end
+          InterRegionApiMethodRelay.exec_api_call(region_number, collection_name, action, api_args, id)
         end
       end
     end
@@ -71,14 +69,11 @@ def self.api_client_connection_for_region(region_number, user = User.current_use
     )
   end
 
-  def self.exec_api_call(region, collection_name, action, api_args = nil, &resource_block)
+  def self.exec_api_call(region, collection_name, action, api_args = nil, id = nil)
     api_args ||= {}
     collection = api_client_connection_for_region(region).public_send(collection_name)
-    result = if resource_block
-               collection.public_send(action, api_args, &resource_block)
-             else
-               collection.public_send(action, api_args)
-             end
+    collection_or_instance = id ? collection.find(id) : collection
+    result = collection_or_instance.public_send(action, api_args)
     case result
     when ManageIQ::API::Client::ActionResult
       raise InterRegionApiMethodRelayError, result.message if result.failed?

spec/models/mixins/inter_region_api_method_relay_spec.rb

@@ -83,13 +83,12 @@ def self.test_class_method_action(_arg)
         end
 
         def expect_api_call(expected_action, expected_args = nil)
-          expect(described_class).to receive(:exec_api_call) do |region_num, collection, action, args, &block|
+          expect(described_class).to receive(:exec_api_call) do |region_num, collection, action, args, instance_id|
             expect(region_num).to eq(region)
             expect(collection).to eq(collection_name)
             expect(action).to eq(expected_action)
             expect(args).to eq(expected_args) if expected_args
-
-            expect(block.call).to eq([{:id => id}])
+            expect(instance_id).to eq(id)
           end
         end
 
@@ -229,54 +228,27 @@ def expect_api_call(expected_action, expected_args = nil)
         }.to raise_error(described_class::InterRegionApiMethodRelayError)
       end
 
-      context "when no block is passed" do
-        it "calls the given action with the given args" do
-          args = {:my => "args", :here => 123}
-          expect(api_collection).to receive(action).with(args).and_return(api_success_result)
-          described_class.exec_api_call(region, collection_name, action, args)
-        end
-
-        it "defaults the args to an empty hash" do
-          expect(api_collection).to receive(action).with({}).and_return(api_success_result)
-          described_class.exec_api_call(region, collection_name, action)
-        end
-
-        it "defaults the args to an empty hash when nil is explicitly passed as args" do
-          expect(api_collection).to receive(action).with({}).and_return(api_success_result)
-          described_class.exec_api_call(region, collection_name, action, nil)
-        end
+      it "calls the given action with the given args" do
+        args = {:my => "args", :here => 123}
+        expect(api_collection).to receive(action).with(args).and_return(api_success_result)
+        described_class.exec_api_call(region, collection_name, action, args)
       end
 
-      context "when a block is passed" do
-        let(:resource_proc) { -> { "some stuff" } }
-
-        it "calls the given action with the given args" do
-          expected_args = {:my => "args", :here => 123}
-          expect(api_collection).to receive(action) do |args, &block|
-            expect(args).to eq(expected_args)
-            expect(block.call).to eq("some stuff")
-          end.and_return(api_success_result)
-
-          described_class.exec_api_call(region, collection_name, action, expected_args, &resource_proc)
-        end
-
-        it "defaults the args to an empty hash" do
-          expect(api_collection).to receive(action) do |args, &block|
-            expect(args).to eq({})
-            expect(block.call).to eq("some stuff")
-          end.and_return(api_success_result)
-
-          described_class.exec_api_call(region, collection_name, action, &resource_proc)
-        end
+      it "defaults the args to an empty hash" do
+        expect(api_collection).to receive(action).with({}).and_return(api_success_result)
+        described_class.exec_api_call(region, collection_name, action)
+      end
 
-        it "defaults the args to an empty hash when nil is explicitly passed as args" do
-          expect(api_collection).to receive(action) do |args, &block|
-            expect(args).to eq({})
-            expect(block.call).to eq("some stuff")
-          end.and_return(api_success_result)
+      it "defaults the args to an empty hash when nil is explicitly passed as args" do
+        expect(api_collection).to receive(action).with({}).and_return(api_success_result)
+        described_class.exec_api_call(region, collection_name, action, nil)
+      end
 
-          described_class.exec_api_call(region, collection_name, action, nil, &resource_proc)
-        end
+      it "calls a method on an instance if id is passed" do
+        instance = double("instance")
+        expect(api_collection).to receive(:find).with(4).and_return(instance)
+        expect(instance).to receive(action).and_return(api_success_result)
+        described_class.exec_api_call(region, collection_name, action, nil, 4)
       end
     end
   end