Different software installation tools (e.g. `apt` and `pip`)
save ansible-paybook binary file into different locations.
So the full path to the binary can't be just hardcoded and
we have to rely on a common shell lookup in $PATH instead.
Change-Id: I367e78d7a376c1441d152584c88cd348430eed2a
External inventory repo support adds a lot of baggage to project scope.
The new workflow is a bit simpler:
External commands:
git clone fuel-ccp-installer
git clone inventory_repo inventory
run kargo_deploy.sh
Behavior is now reverted in that if inventory/ dir exists, it will not
overwrite default file contents. However, if CUSTOM_YAML is specified,
it will overwrite data.
Change-Id: I9557cf86972a64ba0e72aa86111f598be66caff3