alua:fix untrack when implicit transition not success
alua:fix untrack when implicit transition not success

when client login, alua_implicit_transition always return with lock state 2
this patch just fix it.

Signed-off-by: Zhang Zhuoyu <f01d1cbd39460ec22c7a71214eaa8f34086168cc@cmss.chinamobile.com>

open-iscsi/tcmu-runner,agrover/tcmu-runner,open-iscsi/tcmu-runner