class names refactoring to not confuse inclusions patterns in Surefire
add files to test Infinitest on Groovy files
bump surefire version to 2.15
add sample project with separate integration tests
Update .gitignore
Add quickstart project with gradle-tomcat-plugin and Log4j2

This projects reproduces ClassCastException on tomcatRun:
https://github.com/bmuschko/gradle-tomcat-plugin/issues/78