merge salv's fix to remove keystone middleware: lp855151
one more 202->200 from tyler
merge tylers additional 202 -> 200 changes
merge additions to OVS readme describing running with multiple hosts
merge brad's changes to make create API calls return 200, not 202
merge unit test for showing unset attachment
merging API docs branch
Merge: lp:~yinliu2/quantum/bug856564
Merge: lp:~bgh/quantum/bug850261
Change-Id: I56fe24c59f918737e57b562343c33ec6dcceac60