HBASE-11915 Document and test 0.94 -> 1.0.0 update
HBASE-12307 Remove unused Imports in hbase-client and hbase-common
HBASE-12285 Builds are failing, possibly because of SUREFIRE-1091

* Reduce the logging level to WARN

Signed-off-by: stack <stack@apache.org>
HBASE-12249 Addendum - Convert tabs to spaces