using ['controllink'] for queries veing executed on cebtral coulumns table

Signed-off-by: Smita Kumari <kumarismita62@gmail.com>

use link 'userlink' for query being fired on tables other than central columns table

Signed-off-by: Smita Kumari <kumarismita62@gmail.com>
Merge pull request #1215 from smita786/gsoc_central_columns_list

using $GLOBALS['controllink'] for queries being executed on cebtral coulumns tab...