Add stup for new method in OSGi R8.

Change-Id: Ifc7fa618928c4feff645d4300dfc9f012d455b62
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
diff --git a/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/expression/FilterTest.java b/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/expression/FilterTest.java
index 597e8bd..979ede0 100644
--- a/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/expression/FilterTest.java
+++ b/bundles/org.eclipse.equinox.p2.tests/src/org/eclipse/equinox/p2/tests/metadata/expression/FilterTest.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- *  Copyright (c) 2010, 2018 IBM Corporation and others.
+ *  Copyright (c) 2010, 2020 IBM Corporation and others.
  *
  *  This program and the accompanying materials
  *  are made available under the terms of the Eclipse Public License 2.0
@@ -289,5 +289,10 @@
 		public Dictionary<String, Object> getProperties() {
 			return new Hashtable<>(dictionary);
 		}
+
+		@Override
+		public Object adapt(Class type) {
+			return null;
+		}
 	}
 }