HBASE-12493 Make User and TokenUtil public
HBASE-12642 LoadIncrementalHFiles does not throw exception after hitting hbase.bulkload.retries.number setting
HBASE-12628 Update instructions for running shell tests using maven.

Signed-off-by: Sean Busbey <busbey@apache.org>
HBASE-12493 Addendum - Fix javadoc warnings
HBASE-12548. Improve debuggability of IntegrationTestTimeBoundedRequestsWithRegionReplicas
HBASE-12606 Sanity check encryption configuration before opening WAL or onlining regions

Also disables IntegrationTestIngestWithEncryption if distributed
cluster configuration is missing prerequisites.