Add oslo.db

blueprint oslo-db-lib

Change-Id: If952099fa4dcf8638cad70d42a12ebcdac28de84
Fix notify_nova options

This patch fixes various typos that prevent the neutron nova
notification options from working.

Change-Id: Ia3fb1e02008b338e2d08e927346397292be4e398
Closes-Bug: #1321347
Merge "Fix notify_nova options"
Merge "Add oslo.db"