(PF-2437) Allow r10k to authenticate to the Forge

In the near future, the Forge will be adding support for authenticated
module downloads. This extends support for token based authentication to
that use case.

doc/dynamic-environments/configuration.mkd

@@ -167,9 +167,8 @@ This defaults to 'https://forgeapi.puppetlabs.com'
 
 #### authorization_token
 
-The 'authorization_token' setting allows you to provide a token for authenticating to a
-custom Forge server. When set, 'baseurl' must also be set.
-You will need to prepend your token with 'Bearer ' if using Artifactory as your Forge server.
+The 'authorization_token' setting allows you to provide a token for authenticating to a Forge server.
+You will need to prepend your token with 'Bearer ' to authenticate to the Forge or when using your own Artifactory server.
 
 ```yaml
 forge:

lib/r10k/initializers.rb

@@ -63,13 +63,7 @@ class ForgeInitializer < BaseInitializer
       def call
         with_setting(:baseurl) { |value| PuppetForge.host = value }
         with_setting(:proxy) { |value| PuppetForge::Connection.proxy = value }
-        with_setting(:authorization_token) { |value|
-          if @settings[:baseurl]
-            PuppetForge::Connection.authorization = value
-          else
-            raise R10K::Error, "Cannot specify a Forge authorization token without configuring a custom baseurl."
-          end
-        }
+        with_setting(:authorization_token) { |value| PuppetForge::Connection.authorization = value }
       end
     end
   end

spec/unit/action/runner_spec.rb

@@ -230,14 +230,6 @@ def call
         runner.setup_settings
         runner.setup_authorization
       end
-
-      it 'errors if no custom forge URL is set' do
-        options = { config: "spec/fixtures/unit/action/r10k_forge_auth_no_url.yaml" }
-        runner = described_class.new(options, %w[args yes], action_class)
-        expect(PuppetForge::Connection).not_to receive(:authorization=).with('faketoken')
-
-        expect { runner.setup_settings }.to raise_error(R10K::Error, /Cannot specify a Forge auth/)
-      end
     end
 
     context "license auth" do