locks on tables/namespaces/regions (Matteo Bertozzi)
Incorporates review comments from
https://reviews.apache.org/r/52589/https://reviews.apache.org/r/54388/
M hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableBase.java
Fix for eclipse complaint (from Duo Zhang)
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/Procedure.java
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureExecutor.java
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureStore.java
Log formatting
M hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/ProcedureTestingUtility.java
Added wait procedures utility.
A hbase-protocol-shaded/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/generated/LockServiceProtos.java
A hbase-protocol-shaded/src/main/protobuf/LockService.proto b/hbase-protocol-shaded/src/main/protobuf/LockService.proto
Implement new locking CP overrides.
A hbase-server/src/main/java/org/apache/hadoop/hbase/client/locking/EntityLock.java
New hbase entity lock (ns, table, or regions)
A hbase-server/src/main/java/org/apache/hadoop/hbase/client/locking/LockServiceClient.java
Client that can use the new internal locking service.
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