Update toci_test.sh support swift in overcloud

With some of the recent changes to the overcloud heat
templates we now make use of Swift in the overcloud.

This updates TOCI to:
 -add swift to the overcloud control images
 -pass heat templates SwiftPassword
 -configure the Swift keystone endpoint

Also, adds a couple other missing elements to the overcloud
image (cinder, dhcp-all-interfaces) which were missing.

Change-Id: I903ecee8dcde6a87a577ea6dcfd7cc935db943c0