Fix the VM Infra button checking EmsCloud providers

app/helpers/application_helper/button/vm_miq_request_new.rb

@@ -8,6 +8,6 @@ def disabled?
 
   def provisioning_supported?
     # TODO: EmsCloud.supporting(:provisioning).any?
-    EmsCloud.all.any? { |ems| ems.supports?(:provisioning) }
+    EmsInfra.all.any? { |ems| ems.supports?(:provisioning) }
   end
 end

spec/helpers/application_helper/buttons/vm_miq_request_new_spec.rb

@@ -0,0 +1,22 @@
+describe ApplicationHelper::Button::VmMiqRequestNew do
+  let(:view_context) { setup_view_context_with_sandbox({}) }
+  let(:button)       { described_class.new(view_context, {}, {}, {}) }
+
+  describe '#disabled?' do
+    context "with no ext_management_systems" do
+      it_behaves_like "a disabled button", "No Infrastructure Provider that supports VM provisioning added"
+    end
+
+    context "with a cloud ext_management_system" do
+      let!(:ems) { FactoryBot.create(:ems_cloud) }
+
+      it_behaves_like "a disabled button", "No Infrastructure Provider that supports VM provisioning added"
+    end
+
+    context "with an infrastructure ext_management_system" do
+      let!(:ems) { FactoryBot.create(:ems_infra) }
+
+      it_behaves_like "an enabled button"
+    end
+  end
+end