Switch to final 1.1.0 oslo.config release

Fixes bug #1128256

oslo.config has now been released to PyPI in time for Grizzly RC1 so
we can switch to using it directly.

Change-Id: I655f831718ae5f4e25e941ee206fe195214a9a91
Compression/tier capabilities for Storwize/SVC.

Compression and tiering support were not exported as capabilities,
and are important features.

Also fix a couple bugs introduced by
https://review.openstack.org/#/c/23830/

Change-Id: I41c304d0da89a050c0345b930b3f45741214b425
Fixes: bug 1146341
Fixed: bug 1155071
Merge "Compression/tier capabilities for Storwize/SVC."
Merge "Switch to final 1.1.0 oslo.config release"