GitlinkMergeTest: fix boxing warnings

Change-Id: I4bdf1ab3e7d7e9d96318e2b16b792aa98ebd2ecd
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java
index c850b4d..f410960 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java
@@ -151,7 +151,7 @@ protected Merger testGitLink(@Nullable String baseLink,
 		ObjectId t = commit(ow, treeT, new ObjectId[] { b });
 
 		boolean merge = merger.merge(new ObjectId[] { o, t });
-		assertEquals(shouldMerge, merge);
+		assertEquals(Boolean.valueOf(shouldMerge), Boolean.valueOf(merge));
 
 		return merger;
 	}