fix(unittests): add support to force run unittests only once

As the verbose output has been enabled for CTest, restrict the
tests runs to just once to reduce the output log.

Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: Icfd1a2c44ac36f0627d023378f29518dbf77e7a6
2 files changed