Fix 2791086 'rvitals reports bash syntax error for BPA nodes'. Only fixed in 2.3

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@3370 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

perl-xCAT/xCAT/PPCcli.pm

@@ -321,6 +321,10 @@ sub lsrefcode {
     } elsif($res eq 'lpar'){
         $cmds[0] = sprintf($lsrefcode{$res}, $d1, $d2);
     }
+    else
+    {
+        return [[0,'Not available']];
+    }
 
     ###################################
     # Send command