Add yast2_clone_system to validate generated profile on stagingY

I updated the yaml scheduler.
I havent done any other change in test_suite but it seems that
adding yast2_clone_system the variable
REPO_SLE_MODULE_DEVELOPMENT_TOOLS needs to be excluded.
Also I removed the xmllint and I modified the block of code to
display the output of the jing.

schedule/staging/autoyast_mini@64bit-staging.yaml

@@ -8,6 +8,7 @@ schedule:
     - autoyast/installation
     - autoyast/console
     - autoyast/login
+    - console/yast2_clone_system
     - autoyast/wicked
     - autoyast/repos
     - autoyast/clone

tests/console/yast2_clone_system.pm

@@ -15,7 +15,7 @@ use base "y2_module_consoletest";
 use strict;
 use warnings;
 use testapi;
-use version_utils qw(is_sle is_opensuse);
+use version_utils qw(is_sle is_opensuse is_staging);
 use utils 'zypper_call';
 use repo_tools 'get_repo_var_name';
 
@@ -42,23 +42,22 @@ sub run {
     # Check and upload profile for chained tests
     upload_asset $ay_profile_path;
 
-    unless (is_opensuse) {
+    unless (is_opensuse || is_staging) {
         my $devel_repo = get_required_var(is_sle('>=15') ? get_repo_var_name("MODULE_DEVELOPMENT_TOOLS") : 'REPO_SLE_SDK');
         zypper_call "ar -c $utils::OPENQA_FTP_URL/" . $devel_repo . " devel-repo";
     }
 
     zypper_call '--gpg-auto-import-keys ref';
-    zypper_call 'install jing';
+    install_jing();
 
-    my $rc_jing    = script_run "jing $xml_schema_path $ay_profile_path";
-    my $rc_xmllint = script_run "xmllint --noout --relaxng $xml_schema_path $ay_profile_path";
+    my $output_jing = script_output "jing $xml_schema_path $ay_profile_path";
 
-    if (($rc_jing) || ($rc_xmllint)) {
+    if ($output_jing) {
         if (is_sle('<15')) {
             record_soft_failure 'bsc#1103712';
         }
         else {
-            die "autoinst.xml does not validate for unknown reason";
+            die "autoinst.xml does not validate for reason\n$output_jing";
         }
     }
 
@@ -68,6 +67,15 @@ sub run {
     select_console 'root-console';
 }
 
+sub install_jing {
+    my $jingrpm = 'https://rpmfind.net/linux/opensuse/distribution/leap/15.2/repo/oss/noarch/jing-20151127-lp152.3.28.noarch.rpm';
+    my $deprpm  = 'https://rpmfind.net/linux/opensuse/distribution/leap/15.1/repo/oss/noarch/relaxngDatatype-2011.1-lp151.2.1.noarch.rpm';
+
+    zypper_call "--no-gpg-checks install $deprpm";
+    #script_run "wget " . $rpmlink . $packagename . " -O " . $rpmname, output=>"get jing from $rpmling";
+    zypper_call "--no-gpg-checks install $jingrpm";
+}
+
 sub post_fail_hook {
     my $self = shift;
     $self->SUPER::post_fail_hook;