Feature Request: #1329 Can't rename column with foreign key constraint.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>

Fixed tests.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>

Fixed coding style conventions.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>

Again fixed some coding conventions.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>