fix issues with glance scripts

- glance was using wrong var name for admin_password
- also missing "\" in several places, breaking multi-line crudini
  commands.
- glance was using wrong tenant name

Change-Id: I280d1db3ed576988f2bf29ea665e1922a37f8752
wait for required services before trying to use them

Change-Id: Ic54e945ee6fe469eb5de127b4d8bab9696896511
both config files should be populated

in the registry container, glance-manage appears to reference
glance-api.conf

Change-Id: I8c08d0b267568bdbfb1398d1c8a21d984ce98b38
replace endpoints on start

Change-Id: If83b589717a8327ba2191ba0584d36bf9e88dc75