Jupyter Enterprise Gateway 0.9.1 release

Jupyter Enterprise Gateway release v0.9.1 focuses on minor bug fixes and test automation and includes the following:

• Address issues with kernel interrupt in local mode
• Fix Apache Toree dependency location required for Scala kernel launcher
• Add integration tests as part of the regular build
  • Basic kernel tests for multiple kernel manager mode
  • Basic runtime tests

Thanks to the following contributors:

• Alan Chin (akchinSTC)
• Kevin Bates (kevin-bates)
• Luciano Resende (lresende)

See the v0.9.1 milestone on GitHub for a complete list of pull requests involved in this release.