Early exit verification code

For these two models which do not have verification implemented yet.

ee/app/replicators/geo/merge_request_diff_replicator.rb

@@ -15,5 +15,9 @@ module Geo
     def carrierwave_uploader
       model_record.external_diff
     end
+
+    def needs_checksum?
+      false
+    end
   end
 end

ee/app/replicators/geo/terraform_state_version_replicator.rb

@@ -11,5 +11,9 @@ module Geo
     def self.model
       ::Terraform::StateVersion
     end
+
+    def needs_checksum?
+      false
+    end
   end
 end