Allow pkg.install to install packages with an arch in the name

This is for (often) poorly created vendor packages such as kernel modules
where you can't easily re-spin a more correct rpm due to vendor support
issues.

Fixes #13924
Merge branch 'no-pkg-name-normalize-helium' of https://github.com/SEJeff/salt into SEJeff-no-pkg-name-normalize-helium
Tweaks to pkg.instaled state docstring
Merge branch 'SEJeff-no-pkg-name-normalize-helium' into 2014.7