Update es-bro-mappings.json
Update es-bro-mappings.json

copy ssl.server_name, dns.query, and http.host to domain.name
also add analyzer for domain name to ignore/split on "." and filter automatically to lowercase
rocknsm/rock,rocknsm/rock,rocknsm/rock,spartan782/rock,CyberAnalyticDevTeam/SimpleRock,rocknsm/SimpleRock,CyberAnalyticDevTeam/SimpleRock,CyberAnalyticDevTeam/SimpleRock,spartan782/rock,rocknsm/SimpleRock,spartan782/rock,rocknsm/SimpleRock