Removing mandatory check for includeInBorrowerCycle for loan product

Refactor method name for validate boolean method
In add new group activation date field is empty it showing connection fail(fixed)
Merge pull request #416 from goutham-M/mifosx522

In add new group form if activation date field is empty it showing connection fail(fixed)
Merge pull request #414 from mifoscontributer/MIFOSX-212-Test

Removing mandatory check for includeInBorrowerCycle for loan product
Merge remote-tracking branch 'upstream/develop'