Add lmi vg modify command.
Add sssd tests.
Added remote OpenLMI-Storage version checks.
Fixed Selector docstring.
sssd: fix typo in domain errors
sssd: fix set-debug-level --all

Debug level could be set only selectively and not for all components
at once.
sssd: improve documentation
Merge pull request #90 from pavka/sssdfix

SSSD - Fix few issues and improve documentation
Merge pull request #91 from jsafrane/devel/sssd-test

Add sssd tests.
Merge pull request #87 from jsafrane/devel/vgmodify

Add lmi vg modify command.