Rationale is the following:
* 30 sec we need because in 30 sec locks on client will get old enough to _start_ kiling them;
* 10 sec we need because client checks SLV and kills locks every 10 sec;
* 10 sec more we need to make sure that we did not race in worse case scenario and client really had some time to kill locks.
# Let's make sure that we really have some margin. Client checks
# cached locks every 10 sec.
- SLEEP=$((SLEEP+10))
+ SLEEP=$((SLEEP+20))
log "Sleep ${SLEEP} sec"
local SEC=0
while ((SEC<$SLEEP)); do