group retrive accountdetails API changes
Merge pull request #505 from pramodn02/MIFOSX-591

Mifosx 591
mifosx-567 fix externalId defaulting to blank string if not passed as a parameter
Merge pull request #508 from johnw65/externalIds

mifosx-567 fix externalId defaulting to blank string if not passed as a ...
MIFOSX-589 check edit transaction transactiondate for holiday or nonworking day
MIFSOX-428 Api fix for edit user
Merge remote-tracking branch 'upstream/develop'