This reverts commit b66a6acad7.
The mesh test app is (at least for now) only supposed to be manually
run. It e.g. contains special configurations for feature-specific
testing using the Bluetooth PTS.
The ztest conversion that was done to the app doesn't really make any
sense since nothing of essence is tested by the ztest hooks and
everything that the app intends to be tested need manual action either
way.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
a022e950b5