When iterating over xstatic packages which haven't had the benefit
of pip install creating explicit namespace packages for them, we
reset the implicit namespaces which may linger from earlier imports.
Change-Id: Ie6fe282c9d06f0147e37bbe2cf6de9d9c3f0eb39
Xstatic packages need their version hard coded in the source. This
can cause problems if the version committed in the repo is different
than the tag being requested. This adds checking to our validation
to make sure there is not a mismatch for this value.
Change-Id: I5ad54c3623fe5caf3dd075195fb75a3a48165ebf