HBASE-9060 ExportSnapshot job fails if target path contains percentage character (Jerry He)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1507792 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9050 HBaseClient#call could hang

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1507878 13f79535-47bb-0310-9956-ffa450edef68