LU-8618 tests: ha.sh improvements

LU-8618 tests: ha.sh improvements

Patch adds the following ha.sh changes:
- Customise SIMUL and IOR paths.
- Add -p max failover period parameter.
- Add -r dry run parameter.
- Add "iozone" load.
- Add the possibilities to set the number of mpi threads per client.
- CRM is not always configured to fail target back when
  the primary node is back. Add the possibility to execute
  failback command if required.
- The logs from all clients are required if non mpi load fails on
  one client only. Dump logs from all clients.
- Add the possibilities to:
  run ha.sh with custom ior, simul parameters;
  start only the defined list of applications;
  start MPI loads instances on defined number of clients.

Lustre-change: https://review.whamcloud.com/22528
Lustre-commit: d3a044086f5790fec2747c653dca26b8ec529e2d

Test-Parameters: trivial
Seagate-bug-id: MRP-2150, MRP-2896, MRP-3431, MRP-3252, MRP-3495
Signed-off-by: Elena Gryaznova <elena.gryaznova@seagate.com>
Reviewed-by: Vladimir Saveliev <vladimir.saveliev@seagate.com>
Reviewed-by: Alexander Zarochentsev <alexander.zarochentsev@seagate.com>
Reviewed-by: Alexander Lezhoev <alexander.lezhoev@seagate.com>
Reviewed-by: Vitaly Fertman <vitaly.fertman@seagate.com>
Change-Id: I252aa0945286b30ffa6bad40aebf0c2cbc0c7261
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/28524
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>