Updated Travis-CI configuration
Updated Travis-CI configuration

* Changed starting Elasticsearch to the `services` support
* Added Redis and MongoDB services for integration tests

alphagov/tire,dbose/retire,tklee/tire_shiphawk,1776/tire,zaharpecherin/retire,ChapterMedia/tire,fabn/retire,iamrahulroy/retire,brijeshgpt7/retire,mavenlink/retire,karmi/retire,elbuo8/retire,Telmate/tire,doximity/tire,HenleyChiu/tire,rubydubee/retire