Fix gradle build

[NickFitton]

• Update gradle dependencies to match versions in the maven dependencies,
• Add ./gradlew clean install to the travis build to ensure dependencies work on both build systems, ~* Use the stream made as a for each instead of collecting the results to loop through.~

  NOTE: Removed stream change, a separate PR can be found here.

[NickFitton]

Failed maven build seems to be present in master, won't attempt to fix.