Part fix for https://github.com/ansible/ansible-modules-core/issues/1404 (replaces #11086)

Update playbooks_vault.rst

As of 1.9 at least, you may specify a password file in your ansible.cfg and not have to extend your playbook calls with vault flags.

cloudstack: cleanup, remove unused parts 

ansible-pull: Add option to verify gpg signature of a commit

Add option '--verify-commit' to verify a GPG signature of the checked
out commit. As noted in the git module documentantion, this requires
git version >= 2.1.0

Update README.md

There are over 1000 contributors now :)

changed pull to reflect this

added missing cmd_functions with run_cmd, mostly for ansible pull

Remove duplicated "By default" in docs

cloudstack: prevent getting the wrong project.

Since we use domain and account data to filter the project, listall is not needed and can return the wrong identical named project of another account if root admin permissions are used.

Fixed projects names are not case insensitive.

add an example of multiple plays in a single playbook

Fixes #11198

pushed up using host short var
made close conditional, started implementing close for controlmaster

oVirt Dynamic Inventory

Fix confusing wording about aliases

Point out that nicknames for hosts can go in the hosts file, by fixing wording that seemed contradictory.

Don't test for play.become_pass any longer

Raise AnsibleParserError instead of AssertionError