This allows us to control when changes are made to the docker image
that could affect our CI system. This fork is based off the same image
we were using previously, just rolling back a change that was causing
a build failure.

* Ask from user before quitting when using test-integrated-watch

* Add helpful logging to the runner script, refactor file hierarchy

* Add a way to dispatch browser events in tests

* Update test command names and rewrite the frontend testing docs

* Fix test failures

This reverts commit fc15700a.

This commit adds a way to differentiate a local failure from a "early
exit" triggered by a failure on another node. Not separating this can
cause a race condition when two nodes fail at roughly the same time.

Fixes #5521

This unifies the code and the environment variables for specifying
test database connection parameters across all supported
databases. Existing databases that supported environment variables for
tests have been refactored to use the new environment variable
names. All of the connection environment variables are named similar
to:

MB_<DBNAME>_TEST_<PARAM>

For user on MySQL, the variable would be named:

MB_MYSQL_TEST_USER

* jest setup and simple tests for Button

* add jest to CI

* cleanup

* make eslint play nice

to avoid test conflicts with the standard PostgreSQL port 5432
the default port of CrateDB is now set to 5200.

Add CIRCLE_BRANCH_REGEX environment variable to CI script to allow enabling all CI tests on certain branches. Default to master and release-*