-Be explicit about xen bridge stub (required for xen 3.3)

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2490 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

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

@@ -166,6 +166,7 @@ sub build_nicstruct {
         my $rethash;
         $rethash->{type}='bridge';
         $rethash->{mac}->{address}=$_;
+        $rethash->{source}->{bridge}='xenbr0';
         push @rethashes,$rethash;
     }
     return \@rethashes;