Create/run test run configuration from test gutter

[makepanic]

Intellij supports creating and running a test configuration by clicking on a test line marker.

This probably requires a:

• runLineMarkerContributor at each test/describe
• runConfigurationProducer to handle creating a test run configuration from a PsiElement

This depends on https://github.com/Turbo87/intellij-emberjs/pull/166