Reverted bad parts of Bug 495239: Remove Activator from org.eclipse.core.expressions.tests
diff --git a/tests/org.eclipse.core.expressions.tests/META-INF/MANIFEST.MF b/tests/org.eclipse.core.expressions.tests/META-INF/MANIFEST.MF
index a00493f..06f4b7c 100644
--- a/tests/org.eclipse.core.expressions.tests/META-INF/MANIFEST.MF
+++ b/tests/org.eclipse.core.expressions.tests/META-INF/MANIFEST.MF
@@ -13,3 +13,4 @@
  org.junit;bundle-version="3.8.2"
 Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Eclipse-BundleShape: dir
+Bundle-ActivationPolicy: lazy