Ignore integration-test failure on travis-ci for now. Here are what I have found so far.
- ‘migration-plugin-command-script’ fails with a message: The parameters 'v2' for goal org.mybatis.maven:migrations-maven-plugin:1.1.1-SNAPSHOT:script are missing or invalid
- The debug log shows that the invoker.mavenOpts is recognized as MAVEN_OPTS correctly.
- It fails only on travis-ci.
- It ran fine before the recent travis-ci update (http://about.travis-ci.org/blog/2013-11-18-upcoming-build-environment-updates/)