ProvideServices now have choice of execing a process; only accumulo does -and then only when it needs to init the db. HBase just says "no" all the time. The AM uses the new bool value of exec() to decide whether to trigger the flex callback itself
fix TestLiveClusterFromArchiveOnHDFS that still used the version command -did it by subclassing TestLiveClusterFromArchive with some override points to move the archive to HDFS -this should reduce future maintenance
Merge branch 'feature/BUG-10698' into develop
add other exit codes that get raised by YARN to this document