read-only/worm translator is not loaded by default in brick graph because of which
when read-only option is set through volume set volume still remains writable
untill the bricks are restarted as the translator does not have an inmemory flag
to decide whether the read-only/worm option is turned or not.
read-only/worm should be loaded by default in brick graph and the read-only/worm
option can be toggled through volume set command. read-only/worm translator now'
has an in-memory flag to decide whether the volume is read-only or not and based
on that either reject the fop or proceed.
Signed-off-by: Atin Mukherjee <email@example.com>
Tested-by: Gluster Build System <firstname.lastname@example.org>
Reviewed-by: Vijay Bellur <email@example.com>