- disable/enable all namespace pools matched with pass argument in sanity.sh;

- disable all pools (and OST ones too) in ELC tests;
- fixes in test_124:
  - make test_124 less stressing, create only 1000 locks in it;
  - calculate LVF correctly, that is, based on lock number created, desired sleep time and current limit instead of cardcoded value;
  - make test suitable for running CMD environment, where desired set of data may be shared between few MDSes.