added new parsing logic for query attribute
so if user wants to expand the fields of a
relations ( many 2 one, one 2 one , and so)
it should add . to the name of the relation like
?expand=location,location.venue
that will expand the location venue.
Change-Id: I6c50d10e793f017da9146dbce5c5e86a631d9224
e5b161a997