Fixed logicalfile tests.

- file name is in coulmn 10 of 'ls -Z'
- selinux label is in column 5
- do not list '..' and '.'
- skip any 'total BLOCKS' in the first line of ls -lAZ output, rawhide puts it
  there, while Fedora 21 not.
Don't install the metacommand during tests.

It's already installed (or at least should be), all other tests work this way.
sssd: Fixed the tests.

On a clean machine, krb5.keytab must be initialized to allow our /var/lib/sss/*
cache to work.
Merge pull request #124 from jsafrane/devel/fix-file-tests

Devel/fix file tests
Merge pull request #125 from jsafrane/devel/fix-sssd-tests

sssd: Fixed the tests.
Merge pull request #126 from rnovacek/master

networking: workaround for instance modification problem in shell
networking: do not fail when setting has no device assigned