Version update for 4.2.0

Parent has been updated to 4.2.0.Alpha1-SNAPSHOT and all plugins
to 4.2.0-SNAPSHOT. Also, the ranges for bot ext version in all
manifests has been updated from [4.1.0,4.2.0) to [4.2.0,4.3.0).
Reflects refactoring made to JBT JST component
Change integration repo url for maintenance

Since we finally branched for 4.1.x, now is the time to change the repo url
on maintenance branch to 4.1.kepler.
Updated tests to run on both Kepler and Luna. Removed reference to text
strings that only appear on Kepler.
Using RedDeer to get services from RESTful Explorer