protected void releaseSyncLatch() {
    ProcedurePrepareLatch.releaseLatch(syncLatch, this);
  }
Create the namespace directory
@param env          MasterProcedureEnv
@param nsDescriptor NamespaceDescriptor
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/AbstractStateMachineNamespaceProcedure.java