Currently, the oslo config generator takes glance_store configs in
consideration while generating sample configs for the registry. Registry
doesn't really need these configs.
This patch removes the store config namespace from the oslo
config generator's setup to avoid regeneration of store section in
registry sample.
Sample configs have been regenerated using `tox -e genconfig` command to
make sure they reflect the change proposed. Only the
glance-registry.conf file has been refreshed as a part of this commit.
Closes-Bug: 1584350
Change-Id: I27c53d281dcd97a30c22a27c4833b24e1ca84f83
a0bddc9a70