Remove IntelliJ > 2016.02 from supported IDEs
Remove IntelliJ > 2016.02 from supported IDEs

IntelliJ 2016.03 isn't supported as dev environment for
Gerrit. It is much better to be more restrictive in our
docs and avoid people trying to make it work where it
wouldn't.

Change-Id: I2d65ea5e77713e974a19b408d4fb9e7e711985ec

qtproject/qtqa-gerrit,WANdisco/gerrit,gerrit-review/gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,WANdisco/gerrit,gerrit-review/gerrit,WANdisco/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,WANdisco/gerrit,gerrit-review/gerrit,WANdisco/gerrit,gerrit-review/gerrit,GerritCodeReview/gerrit,gerrit-review/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,qtproject/qtqa-gerrit,qtproject/qtqa-gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit