add one limitation for rackenv. It couldn't be used when the nodes' hcp is hmc

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@9518 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

perl-xCAT/xCAT/PPCvitals.pm

@@ -56,6 +56,13 @@ sub parse_args {
     if ( !defined( $cmd )) {
         return(usage( "Invalid command: $ARGV[0]" ));
     }
+     
+    if($ARGV[0] =~ /^rackenv$/) {
+        if($request->{hwtype} =~ /^hmc$/) {
+            return(usage( "Command $ARGV[0] is not valid when the nodes' hcp is hmc" ));
+        }
+    }
+
     ####################################
     # Check for an extra argument
     ####################################