build(deps): bump jetty-servlet (#374)
build(deps): bump jetty-servlet (#374)

Bumps [jetty-servlet](https://github.com/eclipse/jetty.project) from 9.4.14.v20181114 to 9.4.15.v20190215.
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.4.14.v20181114...jetty-9.4.15.v20190215)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
arquillian/smart-testing,arquillian/smart-testing,arquillian/smart-testing