Fix refs to with_system_account decorator

This renames this decorator to with_system_user, to go along with
changes in https://github.com/saltstack/salt-testing/pull/14.
introduce structure to execute over many hosts
Allow almost all lxc runner commands to hot many containers at once
lint
Merge pull request #12299 from terminalmage/update-decorator

Fix refs to with_system_account decorator
2014.1.2 -> 2014.1.3

2014.1.2 was not officially released, fix these RST directives.
Merge pull request #12306 from terminalmage/version-fix

2014.1.2 -> 2014.1.3
Tweak loglevel for dmidecode warning

In 18056a3 I changed the loglevel to WARNING, in my brain that was the
next *less* verbose loglevel, when in reality this should have been
changed to DEBUG.

Since the change, now all salt CLI commands show this warning since the
default CLI loglevel is warning. This is obviously not what I intended.

Also, this changes the warning about lspci to loglevel DEBUG.
In order not to change the arguments order
Merge pull request #12310 from terminalmage/quickfix

Tweak loglevel for dmidecode warning
update the init runner to take multiple container names