Following cases tested and working.

1. Add lvols to group . Working as expected
2. Set limits to group. Working as expected
3. Update the limits for the group . Working as expected
4. Disable the limits for the group. Working as expected.
5. Enable the limits again. Working as expected.
6. Remove the lvols form the group. Working as expected.
7. Test 1 to 5 is have tried multiple times as it works as expected.

Author: sangramsimplyblock