LU-4839 tests: wait for copytool start sanity-hsm/60

LU-4839 tests: wait for copytool start sanity-hsm/60

Wait for copytool to start transfer before checking progress interval.
copytool, in certain environments (heavily loaded NFS backed target),
can take an extrodinarly long time (>30s) to open destination file.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I56908a16240b61a51fe1395a8104eddc6aa3131f
Reviewed-on: http://review.whamcloud.com/13731
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Reviewed-by: Henri Doreau <henri.doreau@cea.fr>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>