HBASE-8811. REST service ignores misspelled 'check' parameter, causing unexpected mutations (Chip Salzenberg and Andrew Purtell)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1497211 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/0.94' into 0.94-gd