core: fetch cpu profile id for vm object

This field is missing when getting vm from vms view.
To be submitted only in 3.5 branch (since there was
a refactoring made in vm dao mappers in u/s).

Change-Id: Ifbff849008c5e339a6c761a86c5f134e0ad20523
Bug-Url: https://bugzilla.redhat.com/1084930
Signed-off-by: Omer Frenkel <ofrenkel@redhat.com>