Bugfix/apt repository

fixed missing module argument for mount module

Use Python 2.4 compatible syntax

A couple fixes for setup module

If ip is not found in either /sbin or /usr/sbin, this will return
an empty result.  It seems extremely unlikely that a linux system will
not have iproute2 installed

Specify full path to ip and add third argument 'show' to be explicit
about requested action.  This goes from 'ip addr' to
'/sbin/ip addr show'.

Add module common code to allow it to be easier to indicate whether arguments are mutually exclusive, required in conjunction, or whether one of a list of arguments is required.  This simplifies writing Python modules.

Make pep8 tests run against the library directory as well, and associated tweaks (mostly to indentation) in the library
directory.

Add openvz detection to virtualization facts, and some cleanup

Remove tests that involve network effects -- makes things faster and they are not really deep tests here either way.

Various retooling of the internal code behind inventory pattern matching in support of pending support
for host ranges.