PHPUnit test case

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

Fix coding style

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

Fix coding styl

Signed-off-by: Smita Kumari <kumarismita62@gmail.com>
Merge pull request #1230 from smita786/gsoc_central_columns_list

PHPUnit test case for central_columns.lib.php