Bump python-swiftclient version

https://review.openstack.org/#/c/69187/ introduced SSL certificate checking
in python-swiftclient (released as v2.0). This patch ensures that the version
of swiftclient used will verify SSL certificates correctly.

This patch also documents the `swift_store_auth_insecure` configuration
option for bypassing the cert verification

DocImpact
SecurityImpact

Change-Id: I20ddab5c3359071daf7505268c72331e4c786987
Move `location`'s domain code out of glance.store

This patch moves the location domain's specific code out of
glance.store. Since this code is Glance specific, it's necessary to move
it out of the store package so that we can then remove it all together
and use the `glance.store` library.

Partially-Implements blueprint: create-store-package

Change-Id: I7dc3d5d211054cabc2adc2b9b689cda11bce2190
Merge "Bump python-swiftclient version"
Merge "Move `location`'s domain code out of glance.store"