MIFOSX-1175 add extra param to assign staff to group with integration test
Merge branch 'MIFOSX-1175' of git://github.com/Musoni/mifosx into Musoni-MIFOSX-1175

Conflicts:
	mifosng-provider/src/main/java/org/mifosplatform/portfolio/group/domain/Group.java
	mifosng-provider/src/main/java/org/mifosplatform/portfolio/group/service/GroupingTypesWritePlatformServiceJpaRepositoryImpl.java
updates to accounting section of api-docs