Test case and fix for shlex.split unicode bug

When operating on a unicode string in python 2.6, shlex.split returns
a result that does not work with the file constructor.

To reproduce this requires a task include that is templated (this is
because the templated string is a unicode result, whereas a non-
templated string is a non-unicode string)

    [will@centos6.3] $ python
    Python 2.6.6 (r266:84292, Sep 11 2012, 08:34:23)
    [GCC 4.4.6 20120305 (Red Hat 4.4.6-4)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import shlex
    >>> shlex.split(u'abc')
    ['a\x00\x00\x00b\x00\x00\x00c\x00\x00\x00']

    [will@fedora17] $ python
    Python 2.7.3 (default, Jul 24 2012, 10:05:38)
    [GCC 4.7.0 20120507 (Red Hat 4.7.0-5)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import shlex
    >>> shlex.split(u'abc')
    ['abc']

The proposed fix (coercing the include parameters to string before the
shlex.split) may not be ideal but it does fix the bug for my test case.
Enable virt module to work with different libvirt connection uris. This allow to work with all libvirt supported VMs.
Merge pull request #2616 from victorcoder/devel

Enable virt module to work with different libvirt connection uris.
Merge pull request #2620 from willthames/shlex_split_bug

Test case and fix for shlex.split unicode bug