Issues:
* cmd.wait doesn't work correctly with bg=True
* cmd.wait will be deprecated in next releases [1]
* watch/watch_in work differently than onchanges/onchanges_in as some
* module override mod_watch()

This patch does:
* Replaces cmd.wait to cmd.run with onchanges.
* On any config file changes salt_minion_service_restart will be
  triggered so salt master will get state immediately because of bg=True
* salt_minion_service is used only for service enablement

[1] https://docs.saltstack.com/en/latest/ref/states/all/salt.states.cmd.html

Change-Id: I7b87b3614708b861e1767566426c7a67c337ba01
Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

Currently the CI job fails with module not found errror.
AttributeError: 'module' object has no attribute 'check_refresh

The reason is new version of salt tries to call
salt.utils.pkg.check_refresh which is not available in 2016.11.3 but is
available in 2016.11.6.
Reference:
1. https://github.com/saltstack/salt/blob/v2016.11.3/salt/states/pkg.py
2. https://github.com/saltstack/salt/blob/v2016.11.6/salt/states/pkg.py#L1819

The fix proposed here is to use pkg.installed instead of pkg.latest.
It's not a good idea to always update salt whenever the salt state is
run, this may introduce failures unknown to the user. There is a pipeline
to update packages which should be used for updating to latest.
pkg.latest generally isn't a good way to write idempotent formulas. See
official salt docs: "Generally it is better for the installed function
to be used, as latest will update the package whenever a new package is
available."

Change-Id: I8da5c36c1613e54768993080f2514afc920c49f8

Change-Id: I7b4dc2001e07b047964f4ebbbbe0b23db7819566

Change-Id: Ie1f1397817b47f299107e4f44dfb4c5ffe1c010c

Change-Id: I6f1292779858c45f9cf6f4caf3657ee000b2cf06

Unfortunately this is not idempotent, however we surely want to sync
everything when salt.minion state is executed.

Change-Id: I0faaf606b57dbd7d009156abfe50d2e5f350190e

source:engine metadata created - defaults to pkg
installation, pip installation alternative added