Revert Gradle version to 1.6 to bypass OSS build issue with Gradle 1.11.
1.1 won't work with archaius-scala. Move back to 1.6 to see if it's one-off build error.
Some random error with 1.6. Moving back to 1.7 for now to clear Archaius build. Waiting to see if we can solution with either move OSS to later gradle build than 1.6 or roll back scala changes that requires gradle 1.7 and beyond