Convert RedDeer tests to SWTbot ones or pure JUnit ones where feasible

[akurtakov]

RedDeer is retiring from Eclipse Simrel and Docker tooling tests are already using Swtbot in tests (https://github.com/eclipse-linuxtools/org.eclipse.linuxtools/tree/master/containers/org.eclipse.linuxtools.docker.ui.tests) thus it make sense to convert the RedDeer ones into Swtbot ones(https://github.com/eclipse-linuxtools/org.eclipse.linuxtools/tree/master/containers/org.eclipse.linuxtools.docker.integration.tests) to have unified testing framework.
The tests in question are:

org.eclipse.linuxtools.docker.integration.tests.connection 9.3 sec 0 0 1 1
org.eclipse.linuxtools.docker.integration.tests.container 2 min 58 sec 0 0 13 13
org.eclipse.linuxtools.docker.integration.tests.image 1 min 41 sec 0 2 7 9
org.eclipse.linuxtools.docker.integration.tests.ui 2 min 43 sec 0 1 12 13

[akurtakov]

There may be overlap between swtbot and reddeer so some tests might not be needed at all.
For reference, here is Platform reddeer tests converted to plain junit ones eclipse-pde/eclipse.pde@b01e2c4 .

[akurtakov]

Looking at https://github.com/eclipse-linuxtools/org.eclipse.linuxtools/blob/master/containers/org.eclipse.linuxtools.docker.ui.tests/src/org/eclipse/linuxtools/internal/docker/ui/views/DockerImagesViewSWTBotTest.java and https://github.com/eclipse-linuxtools/org.eclipse.linuxtools/blob/59a645a031ea920929f53cb4da5f154fef8acdbc/containers/org.eclipse.linuxtools.docker.integration.tests/src/org/eclipse/linuxtools/docker/integration/tests/ui/ImageTabTest.java are testing the same view .
Thus if there is anything in the reddeer test not done in swtbot only it should be converted and added to the already existing swtbot test.

[akurtakov]

Closing. The tests are no longer easily runnable to make comparison.