In case Kolla's users want to deploy with both of
binary and source image, we should have a variable
install type that define install type for each project.

We also add specific image tag for each Openstack project.

This commit is implemented for Designate, Gnocchi and Heat projects.

Change-Id: I07451750e70e0e6305dca451422e33cd31ce8a4c
Implements: blueprint mixing-binary-and-source-image