KIJIMR-287. Upgrade mrunit and make it a test dependency.

MRUnit was a compile time dependency making it get pulled into other projects'
classpath which is not desirable in case of classpath issues.

Review: https://review.kiji.org/r/1961/
Reviewer: taton
KIJIMR-288. Update KijiMR to use Providers to select KijiTableInputFormat based on KijiURI.

issue: https://jira.kiji.org/browse/KIJIMR-288
review: https://review.kiji.org/r/1964
Remove spurious file.
KIJIMR-285. Eliminate Maven build profile for KijiMR profiling, replaced by a traditional Maven module.

issue: https://jira.kiji.org/browse/KIJIMR-285
review: https://review.kiji.org/r/1924