Avoid running addons SWT tests twice in the Tycho build

The org.eclipse.e4.ui.workbench.addons.swt.test bundle defined an AllTests
@suite while Tycho also scans test classes by name, so MaximizeBugTest,
MaximizePartSashContainerPlaceholderTest and CleanupAddonTest each ran twice
per build. For MaximizeBugTest that wasted about 35 seconds on every platform.

Remove the redundant AllTests suite and rename MaximizableChildrenTag to
MaximizableChildrenTagTest so the scanner runs it directly. Every test class
now runs exactly once. The bundle has no test.xml, so the Ant nightly is not
affected.

Author: vogella

tests/org.eclipse.e4.ui.workbench.addons.swt.test/src/org/eclipse/e4/ui/workbench/addons/AllTests.java

@@ -45,7 +45,7 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class MaximizableChildrenTag {
+public class MaximizableChildrenTagTest {
 
 	private static final String MAXIMIZEABLE_CHILDREN = IPresentationEngine.MIN_MAXIMIZEABLE_CHILDREN_AREA_TAG;
 	private Shell shell;