Merge branch 'ash.mckenzie/allow-auth-via-jwt' into 'master'

Allow auth via JWT (always false in CE)

See merge request gitlab-org/gitlab-ce!21038

lib/gitlab/git_access.rb

@@ -233,6 +233,8 @@ module Gitlab
         end
       elsif user
         # User access is verified in check_change_access!
+      elsif authed_via_jwt?
+        # Authenticated via JWT
       else
         raise UnauthorizedError, ERROR_MESSAGES[:upload]
       end
@@ -321,6 +323,10 @@ module Gitlab
       !Gitlab.config.gitlab_shell.receive_pack
     end
 
+    def authed_via_jwt?
+      false
+    end
+
     protected
 
     def changes_list