Make core.tests.harness optional, only needed for performance tests.
diff --git a/bundles/org.eclipse.equinox.region.tests/META-INF/MANIFEST.MF b/bundles/org.eclipse.equinox.region.tests/META-INF/MANIFEST.MF
index 4942386..f523e40 100644
--- a/bundles/org.eclipse.equinox.region.tests/META-INF/MANIFEST.MF
+++ b/bundles/org.eclipse.equinox.region.tests/META-INF/MANIFEST.MF
@@ -8,7 +8,7 @@
Import-Package: junit.framework;version="4.8.1",
org.easymock;version="2.4.0",
org.eclipse.osgi.service.urlconversion;version="1.0.0",
- org.eclipse.core.tests.harness,
+ org.eclipse.core.tests.harness; resolution:="optional",
org.junit;version="4.8.1",
org.osgi.util.tracker;version="1.5.0",
org.aspectj.internal.lang.annotation;version="[1.6.3, 2.0.0)",