Samarth

changes in regression to take care of https://issues.apache.org/jira/browse/FALCON-280

pls take look at latest commits since i have remove the changes made in initial commits
In its current form this can lead to unpredictable behavior. 
To give you an example, suppose there are two tests: TestA and TestB.

Consider this order of execution:
- TestA calls this like setFeedACL(feed, "a" , "b")
- mytest
- TestB calls this like setFeedACL(feed)

Now consider another order of execution,
- TestB calls this like setFeedACL(feed)
- mytest
- TestA calls this like setFeedACL(feed, "a" , "b")
In this case mytest will see aclOwner = {value from Merlin.properties}, aclGroup = {value from Merlin.properties}

Hence, the value mytest sees depends on the order of test execution.