using stringutils from apache.commons.lang
Merge branch 'master' into samarth

Conflicts:
	merlin-core/src/main/java/org/apache/falcon/regression/core/interfaces/IEntityManagerHelper.java
merging with master
removing cdh4 profile, making package groupID if as org.apache.falcon.regression
time of test reduced from 24 to 11 minutes
extra semicolon removed
Merge branch 'master' into samarth
Merge pull request #317 from samarthgupta437/samarth

 removing cdh4 profile, making package groupID if as org.apache.falcon.regression
Merge pull request #318 from pisaychuk/master

reduced time of test
fixing group id of merlin-core
Merge pull request #319 from raghavgautam/master

fixing group id of merlin-core
removing redundant methods for converting to/from Cluster and String
removing redundant methods for converting to/from Process and String
removing redundant methods for converting to/from Feed and String
unifying marshalling/unmarshalling code
fixing start date of EmbeddedPigScriptTest and ProcessInstanceRunningTest
unifying usage of Merlin.properties
removing unused envFileName property from IEntityManagerHelper
removing PrismHelper class as it is same as ColoHelper class
removing unused imports