L2SS-287: Try to have version discoverability for packaging

devices/__init__.py

 from util.lofar_git import get_version
 
 __version__ = get_version()
-

devices/version.py

+import pbr.version
+
+version_info = pbr.version.VersionInfo('TangoStationControl')
+version_string = version_info.version_string()