Improve POD logs retrieval

[tommaso-borgato]

We can improve logs retrieval not limiting the retrieval to the logs of the main container of POD; we can retrieve the logs from all the containers in the POD which have log;

Basically we could improve the savePodLogs function (https://github.com/xtf-cz/xtf/blob/master/junit5/src/main/java/cz/xtf/junit5/extensions/OpenShiftRecorderService.java#L448) and iterate on all containers inside each POD and retrieve each containers's log;