Rollback hook registration on errors

When subcribing the H_HOOK_INITs, unsubscribe from all
stops again, once a registration is not successful.
The transport does not stop then and should not maintain
any hook registrations (which case errors next time,
which aborts the pausing of the transport).

Change-Id: Ib0ddf1a152507e73f43cd10941b30b0d5a175d03
1 file changed