Support Postgres

@divyakumarjain Removing this as it is tightly coupled with super-api. Enabling only `local` profile as far as super api is concerned. 
Extending this property in child pom i.e., in `gal-application`  for the profile `local,mysql`. Possible profiles are `local,postgres`, `local,mysql`.

The following location contains the details related to change.https://github.com/sveluri/gal-application/blob/DB-changes/pom.xml

Along with that, there are few other changes in that branch related to `postgres integration with application`. 

@gakakarlapudi for your reference.