Make pidgeon cleanup more robust

-use zypper to remove and check package
-use grep instead of needle

tests/x11/pidgin/clean_pidgin.pm

@@ -1,7 +1,7 @@
 # SUSE's openQA tests
 #
 # Copyright © 2009-2013 Bernhard M. Wiedemann
-# Copyright © 2012-2019 SUSE LLC
+# Copyright © 2012-2020 SUSE LLC
 #
 # Copying and distribution of this file, with or without modification,
 # are permitted in any medium without royalty provided the copyright
@@ -17,17 +17,14 @@ use base "x11test";
 use strict;
 use warnings;
 use testapi;
-use utils 'clear_console';
 
 sub remove_pkg {
     my @packages = qw(pidgin);
     x11_start_program('xterm');
 
     # Remove packages
-    assert_script_sudo "rpm -e @packages";
-    clear_console;
-    type_string "rpm -qa @packages\n";
-    assert_screen "pidgin-pkg-removed";    #make sure pkgs removed.
+    assert_script_sudo "zypper -n rm @packages";
+    assert_script_run "zypper --no-refresh if @packages|grep 'not installed'";
     type_string "exit\n";
 }