(blktests-ddp.jinja2): Add loopback ping test as requested by Jakub

Signed-off-by: Denys Fedoryshchenko <[email protected]>

Author: nuclearcat

config/runtime/tests/blktests-ddp.jinja2

@@ -20,6 +20,7 @@
               - apt-get update
               - apt-get install -y sshpass
               - sshpass -p 'DougIsHero' ssh -T -o StrictHostKeyChecking=no doug@$(lava-target-ip) "cd nvidia-blktest && mkdir -p mnt && sudo ./orchestrator.py orchestrator.yml {{ node.id }} {{ api_config.name }} {{ rootfs }}"
+              - lava-test-case ping_loopback --shell sshpass -p 'DougIsHero' ssh -o StrictHostKeyChecking=no doug@$(lava-target-ip) "ping -c 5 127.0.0.1"
               - lava-test-case nvme_056_tcp_ddp --shell sshpass -p 'DougIsHero' ssh -o StrictHostKeyChecking=no doug@$(lava-target-ip) "grep 'pass' nvidia-blktest/nvme_056_tcp_ddp.test"
               - sshpass -p 'DougIsHero' ssh -T -o StrictHostKeyChecking=no doug@$(lava-target-ip) "sync && sudo systemctl poweroff"
               - sleep 10