CSIT-365: IPv6 encaps softwire - MAP-E part II - check traffic with multiple domains configured. Generate given amount of random configurations. - add map-e hairpinning test. - add icmp test for map-e. - reformat map_e.robot, capitalize all KW. Change-Id: I94c4c9d6b186cc4a7c65cdb84ee795365dff5e82 Signed-off-by: Matej Klotton <mklotton@cisco.com>