Run UTIL & MDB tests in stability mode

And the second one is stability mode - for testing the util & mdb stability. In this case you should put the number of cycles (for example, to run 1000 cycles - ./test-script.sh 1000). And now after script is finished you will find logs in the util-test.<N>.txt and mdb-test.<N>.txt form in the /var/tmp folder, where <N> - is a cycle number.