HBASE-9463  Fix comments around alter tables

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521270 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9458 Intermittent TestFlushSnapshotFromClient#testTakeSnapshotAfterMerge failure



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521280 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9453 make dev-support/generate-hadoopX-poms.sh have exec perms


git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521285 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9449 document how to use shell enhancements from HBASE-5548


git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521288 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9478 Make Cell @InterfaceAudience.Public and Evolving


git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1521305 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd