Allow assign parent office staff to group

Fixing missed fun
Merge pull request #394 from mifoscontributer/MIFOSX-480

Allow assign parent office staff to group
updating client apis to allow linking with staff from parent offices
Merge pull request #395 from vishwasbabu/develop-old

updating client apis to allow linking with staff from parent offices
initialise loans_paid_in_advance table (batch job updates daily afterwards)
Merge pull request #396 from johnw65/tevieile

initialise loans_paid_in_advance table (batch job updates daily afterwar...