Revert "Updating docs for Travis build: https://travis-ci.org/grails/grails-data-mapping/builds/"

This reverts commit 8267741a3bc6fbad247ec1fae1f76219b8945bf2.
Revert "Updating docs for Travis build: https://travis-ci.org/grails/grails-data-mapping/builds/"

This reverts commit 9d4eb52a33f97a5015fa1f3f462a60a7babddc9f.