Revert the openstacksdk subclassing from shade. The idea was to
reduce the workload, but trying to make sure that the Cloud abstraction
in openstacksdk doesn't break shade's contract while we update things is
a ton of work to meet the contract that's not really valuable to people.
Instead, we'll put shade on lifesupport and only accept bugfix patches.
Revert "Make OpenStackCloud a subclass of Connection"
This reverts commit ab3f400064.
Revert "Use openstack.config directly for config"
This reverts commit 2b48637b67.
Revert "Remove the task manager"
This reverts commit 28e95889a0.
Change-Id: I3f5b5fb26af2f6c0bbaade24a04c3d1f274c8cce
3b2cad5d31