Support icehouse in keystone_manage

The database migration functions moved around in keystone during the
icehouse cycle. This patch adds support for this release.
Merge pull request #19 from ObjectifLibre/keystone_manage-icehouse

Support icehouse in keystone_manage
Add icehouse support to glance_manage

Handle the various changes done in glance for db migration during the
icehouse cycle.
Add support for icehouse in cinder_manage
Merge pull request #21 from ObjectifLibre/cinder_manage-icehouse

Add support for icehouse in cinder_manage
Merge pull request #20 from ObjectifLibre/glance_manage-icehouse

Add icehouse support to glance_manage