Set keywords for RuboCop cop Style/CommentAnnotation

The offense from the TODOs  was a false positive. The comment which
triggered this was `# review accepted`.

src/api/.rubocop.yml

@@ -28,6 +28,12 @@ Lint/StructNewOverride:
 
 #################### Style ###########################
 
+Style/CommentAnnotation:
+  # Default keywords were TODO, FIXME, OPTIMIZE, HACK, REVIEW.
+  # We never use the last three and they can sometime trigger false positives,
+  # especially when a comment starts with "review" since we have those in OBS
+  Keywords: ['TODO', 'FIXME']
+
 # We need to allow some variables related to rabbiMQ.
 Style/GlobalVars:
   AllowedVariables: ['$rabbitmq_conn', '$rabbitmq_exchange', '$rabbitmq_channel']

src/api/.rubocop_todo.yml

@@ -555,14 +555,6 @@ Style/ClassVars:
     - 'test/functional/branch_publish_flag_test.rb'
     - 'test/test_helper.rb'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: Keywords.
-# Keywords: TODO, FIXME, OPTIMIZE, HACK, REVIEW
-Style/CommentAnnotation:
-  Exclude:
-    - 'test/functional/request_controller_test.rb'
-
 # Offense count: 5
 Style/CommentedKeyword:
   Exclude: