JBIDE-13759 Reorganize Seam tests to avoid having too many tests plugins

Removed tests for Seam 2.0.x, 2.1.x, 2.2.0.x. So we now have tests for Seam 1.2.1.EAP, FP, 2.1.2.GA, 2.2.1.GA, 2.3.0.Final only.