Fix bug with optional persistence where reset no longer survives

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/branches/2.8@15493 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/kvm.pm

@@ -2300,8 +2300,9 @@ sub power {
             unless ($newxml) { $newxml=$oldxml; } #TODO: remove this when the 'else' line can be sanely filled out
             if ($newxml) { #need to destroy and repower..
                 $updatetable->{kvm_nodedata}->{$node}->{xml}=$newxml;
+		my $persist = $dom->is_persistent();
                 $dom->destroy();
-		$dom->undefine();
+		if ($persist) { $dom->undefine(); }
                 undef $dom;
                 if ($use_xhrm) {
                     xhrm_satisfy($node,$hyp);