lightdm-gtk-greeter-settings-1.2.2-bp156.3.1

- Fixed python dependencies and added gobject-introspection for code
  inspection and automatic dependency generation on typelib()
- Cleaned up parts of spec file with aid of spec-cleaner

- Revert renaming of *.policy.in in previous commit

- dropped dont-use-polkit.patch
- several adjustments to the spec file and clean ups

- Trim bias from description.

- updated package to 1.2.2 and build target Tumbleweed

- Initial commit.