remove an unecessary global variable

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@10996 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

perl-xCAT/xCAT/DBobjUtils.pm

@@ -1039,7 +1039,8 @@ sub setobjdefs
                 #
                 # get the actual attr name to use in the table
                 #    - may be different then the attr name used for the object.
-                ($::tab, $::tabattr) = split('\.', $this_attr->{tabentry});
+                my $ntab;
+                ($ntab, $::tabattr) = split('\.', $this_attr->{tabentry});
 
                 my $rc = xCAT::DBobjUtils->parse_access_tabentry($objname, 
                                                                 $this_attr->{access_tabentry}, \%tabentry);