global: addition of models from view args
global: addition of models from view args

* NOTE It is necessary to add models retrieved as view arguments to
  current database session since new SQLAlchemy scoped session is
  created when request context is pushed.

Signed-off-by: Jiri Kuncar <2bdffcb416fed3002465740d19a053a39918cbe5@cern.ch>

inveniosoftware/invenio-records-rest,tiborsimko/invenio-records-rest,inveniosoftware/invenio-records-rest,tiborsimko/invenio-records-rest