Create new server test_reboot_server_hard
It sometimes fail in all gates [1]
This hack could highlight if it's a timeout issue or race conditions
between all tempest tests.
[1] http://artifacts.opnfv.org/functest/E5AZMH89OOK6/functest-opnfv-functest-smoke-cntt-hunter-tempest_full_cntt-run-142/tempest_full_cntt/tempest-report.html
Change-Id: I8d03aa10c3d822dacb983e5ca019f79e1c582c9e
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
(cherry picked from commit
c29cdcb448cf0d61f4c48acb939d5a943c138a48)