fixing process update test and adding feed update test
Merge branch 'master' into samarth

Conflicts:
	merlin/src/test/java/org/apache/falcon/regression/prism/NewPrismProcessUpdateTest.java
adding InstanceParamTest
Merge branch 'master' into samarth

Conflicts:
	merlin/src/test/java/org/apache/falcon/regression/prism/NewPrismProcessUpdateTest.java
replacing ProcessInstanceResult with InstanceResult, fixing processUpdate test, adding test to feed update
making changes to waitTillInstanceReachState
Merge remote-tracking branch 'remotes/origin/master' into samarth
removing unused imports
minor refactoring to improve readability
removing redundant code
simplifying generation of unique bundle
extracting ExecUtil class
use ClusterMerlin for generating unique cluster names
using FeedMerlin for generating unique names
moving setFeedClusters() method to feedMerlin
removing unused method
making setProcessFeeds() & setProcessClusters() methods static
use ProcessMerlin for unique names
moving setProcessClusters() method to ProcessMerlin
removing unused method