970fab180c
As become is applied to most of the tasks in the role, let's remove them and suggest applying become on the playbook level instead. We do not have become applied on task level in any other managed role. This also helps to workaround PAM/apparmor issue with CentOS in Docker for molecule test. We also deal with an intermittent failures in Docker, as interface naming/ordering is random and non-deterministic with no way of controlling it. Thus, instead of detecting an IP address by interface, we hardcode the IP address both for containers and in FRR configurations. Change-Id: I73471dd895eea5c6abfbec24681c796d5e7d813d