Clean up stack.sh config

* Clean up interactive configuration
* Complete moving initialization of service-specific varialbes into the
  service lib/* files.
* Cosmetic cleanups

Change-Id: Iea14359bd224dd5533201d4c7cb1437d5382c4d1
Merge "Clean up stack.sh config"
Merge remote-tracking branch 'm_src_repo/citrix-fixes' into build-temp