core: Adding context ctor ProcessOvfUpdateForStorageDomain

Change-Id: Ia170d17191b3fd541fa4b0d695a94e3ed06dee72
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1138124
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>