Add more info on delEntries

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@12652 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

perl-xCAT/xCAT/Table.pm

@@ -3115,6 +3115,10 @@ sub getAllAttribs
          $table->commit;
         Build delete statement and'ing the elements of the hash
         DELETE FROM nodelist WHERE ("groups" = "compute1" AND "node" = "node1")
+
+        If called with no attributes, it will delete all entries in the table. 
+          $table->delEntries();
+          $table->commit;
     Comments:
         none