new launch instance does not work when deployed outside of root url path

[Eric Peterson]

The new launch instance screen dies a horrible death when deployed outside of the "/" root url path (that is, something like "/horizon" or "/dashboard")

A screen shot of this is at
http://pasteboard.co/229k9xhA.png

Logs point out the follow items have hard coded paths:

/api/glance/images/?status=active
/api/nova/keypairs/
/api/nova/flavors/?get_extras=true&is_public=true
/api/nova/availzones/
/api/nova/limits/
/api/network/securitygroups/
/api/keystone/svc-catalog/
/api/keystone/user-session/
/api/nova/extensions/
/api/glance/images/?status=active
/api/nova/limits/
/api/nova/keypairs/
/api/nova/availzones/
/api/nova/flavors/?get_extras=true&is_public=true
/api/network/securitygroups/
/api/keystone/user-session/
/api/keystone/svc-catalog/
/api/nova/extensions/
/api/glance/images/?status=active
/api/nova/flavors/?get_extras=true&is_public=true
/api/nova/keypairs/
/api/nova/limits/
/api/nova/availzones/
/api/network/securitygroups/
/api/keystone/svc-catalog/
/api/keystone/user-session/
/api/nova/extensions/