Bug 574647 - ep421I-unit-cen64-gtk3-java16 build timeouts

Do *not* disable indexer for all UsageTest subclasses, the tests depend
on running indexer and wait forever waiting for the disabled indexer.

Change-Id: I5335652452cc143900fcccc100d554a608a7ba12
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/pde/eclipse.pde.ui/+/182745
Tested-by: PDE Bot <pde-bot@eclipse.org>
diff --git a/apitools/org.eclipse.pde.api.tools.tests/src/org/eclipse/pde/api/tools/builder/tests/usage/UsageTest.java b/apitools/org.eclipse.pde.api.tools.tests/src/org/eclipse/pde/api/tools/builder/tests/usage/UsageTest.java
index 0ede8fb..ca68daf 100644
--- a/apitools/org.eclipse.pde.api.tools.tests/src/org/eclipse/pde/api/tools/builder/tests/usage/UsageTest.java
+++ b/apitools/org.eclipse.pde.api.tools.tests/src/org/eclipse/pde/api/tools/builder/tests/usage/UsageTest.java
@@ -138,6 +138,7 @@
 	 */
 	@Override
 	protected void setUp() throws Exception {
+		indexDisabledForTest = false;
 		// If we have an existing environment, set it to revert rather than
 		// delete the workspace to improve performance
 		resetBuilderOptions();