* Remove checks for docs using exact tags
Instead use a more generic documentation for installing kubespray as a
collection from git.
* Check that we upgraded galaxy.yml to next version
This is only intented to check for human error. The version in galaxy
should be the next (which does not mean the same if we're on master or a
release branch).
* Set collection version to KUBESPRAY_NEXT_VERSION
12a65c45e9