HBASE-12467 Master joins cluster but never completes initialization

Signed-off-by: Andrew Purtell <apurtell@apache.org>
HBASE-12454 Setting didPerformCompaction early in HRegion#compact
HBASE-12553 request value is not consistent for restoreSnapshot in audit logs (Ashish)
    HBASE-12665 When aborting, dump metrics
    Add some fixup of checkstyle fails
HBASE-12601 Explain how to grant/revoke permission to a group/namespace in grant/revoke command usage (Ashish Singhi)
HBASE-12663 unify getTableDescriptors() and listTableDescriptors
Add note on new location to do staging of release candidates from INFRA