CI: Allow restart of the container if deployment fails
In CI we sometimes encounter fail of the gNB/UE deployment (and fail of the test scenario) caused by unsuccessful initialization of the USRP N310.
This MR enables to optionally restart the gNB or UE container, if the deployment fails on the health check during start up. By default, restarts of the container are not allowed, but we can enable them by setting num_attemps > 1 for a given deployment in the XML file.
Logs from failed deployment attempts are collected.
This MR aims to avoid known CI failure caused by "USRP N310 Initialization Failure" mentioned in #871.