instancetype: Split unittests into two contexts
instancetype: Split unittests into two contexts

One context for instncetype tests and the other
for preference tests.

Signed-off-by: Andrej Krejcir <cd319b80dc788d308d262d82d71619ebc6569033@redhat.com>

kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt