Mark LXC as missing for swap volume support
Mark LXC as missing for swap volume support

The attach volume section has LXC listed as 'missing' and you
need to be able to attach a volume when performing a swap
volume operation, so swap volume must also be marked as missing
for LXC.

Change-Id: I97b024d3ff817a7152906b0a88b1b64db93d7d7d

mikalstill/nova,rahulunair/nova,rahulunair/nova,phenoxim/nova,gooddata/openstack-nova,mahak/nova,klmitch/nova,gooddata/openstack-nova,klmitch/nova,rahulunair/nova,mikalstill/nova,openstack/nova,klmitch/nova,gooddata/openstack-nova,phenoxim/nova,mahak/nova,gooddata/openstack-nova,mikalstill/nova,mahak/nova,klmitch/nova,openstack/nova,openstack/nova