Explicitly disable the non-standard-group check

The non-standard-group check has been effectively disabled since rpm
removed the GROUPS file in 4.14.0¹.  Additionally, the Fedora packaging
guidelines discourage the use of the 'Group:' tag², so there is little
point in maintaining a list of valid groups.

¹ https://github.com/rpm-software-management/rpm/commit/0d93b634
² https://fedoraproject.org/wiki/Packaging:Guidelines#Tags_and_Sections

rpmlint.config

@@ -23,6 +23,7 @@ setOption("UseEpoch", False)
 setOption("UseUTF8", True)
 setOption("UseVersionInChangeLog", True)
 setOption("ValidSrcPerms", (int("664",8), int("644",8), ))
+setOption("ValidGroups", [])
 
 setOption("ValidShells", (
     "<lua>",

rpmlint.spec

@@ -138,8 +138,9 @@ make check PYTHON=%{python} PYTEST=%{pytest} FLAKE8=%{flake8}
 %{_mandir}/man1/rpmlint.1*
 
 %changelog
-* Thu May 03 2018 Todd Zullinger <tmz@pobox.com>
+* Thu May 03 2018 Todd Zullinger <tmz@pobox.com> - 1.10-12
 - Properly handle the exception on missing files (bz1574509)
+- Explicitly disable the non-standard-group check
 
 * Wed Apr 18 2018 Todd Zullinger <tmz@pobox.com>
 - Ignore 'no-documentation' in debugsource packages