LU-4438 utils: handle ct_setup() errors

LU-4438 utils: handle ct_setup() errors

Problem has been encountered causing sanity-hsm/test_402 errors
because copytool threads were found still alive after MDCs
deactivation. This appears to be due to no ct_setup() error
handling with continuing+unnecessary startup actions to occur.
Also, now that copytool will exit earlier, HSMTOOL_NOERROR variable
has been added to allow errors in copytool_setup().

Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Change-Id: I108ea679faf2731f2a64fb08d2f8fba9db01c71f
Reviewed-on: http://review.whamcloud.com/9853
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>