webadmin: Copy VNIC profile configuration from template

Upon creation of a new VM from a template, the default VNIC profile
configuration is copied from the template rather than picking the
management profile as default.

Change-Id: Iffc7f38ce068a076fd66c245c178d9ff4813155a
Bug-Url: https://bugzilla.redhat.com/999550
Signed-off-by: Lior Vernia <lvernia@redhat.com>