Apply checkFamilies addendum on increment to 1.1 and 1.0

branch-1.1 and branch-1.0 need this:

— a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
@@ -7377,6 +7377,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
checkReadOnly();
checkResources();
checkRow(mutation.getRow(), op.toString());
+ checkFamilies(mutation.getFamilyCellMap().keySet());
startRegionOperation(op);
this.writeRequestsCount.increment();
try {

Its an addendum on HBASE-15091 so fix for this oversight is in branch-1.2+.