Removing the config-applier element

This is pretty much a duplicate of t-i-e/elements/os-apply-config, isn't used
in tripleo and the upstart script is out of date. We don't need to carry this.

Change-Id: I2b23d5930afae42cff28e2d5ce3d6c84224afa4a
Merge "Removing the config-applier element"