generate less unique entities
do not generate unique bundle in submitBundle()
generateUniqueBundle added where it was missed
Merge remote-tracking branch 'upstream/master' into uniquebundle

Conflicts:
	merlin-core/src/main/java/org/apache/falcon/regression/core/util/Util.java
Merge pull request #304 from rostafiychuk/uniquebundle

less unique names after generateUniqueBundle()