Fix tests for OS X when the tmpdir is the default /tmp

/tmp is a symbolic link and some tests break when the path
gets canonicalized by JGit or Jetty. Allow Jetty to serve
symlinks by setting init parameter "aliases" to true [1].

[1] http://wiki.eclipse.org/Jetty/Howto/How_to_serve_symbolically_linked_files

Change-Id: I45359a40435e8a33def6e0bb6784b4d8637793ac
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.http.test/tst/org/eclipse/jgit/http/test/DumbClientDumbServerTest.java

 
 import org.eclipse.jetty.servlet.DefaultServlet;
 import org.eclipse.jetty.servlet.ServletContextHandler;
+import org.eclipse.jetty.servlet.ServletHolder;
 import org.eclipse.jgit.errors.NotSupportedException;
 import org.eclipse.jgit.junit.TestRepository;
 import org.eclipse.jgit.junit.http.AccessEvent;
 
 		ServletContextHandler app = server.addContext("/git");
 		app.setResourceBase(base.toString());
-		app.addServlet(DefaultServlet.class, "/");
-
+		ServletHolder holder = app.addServlet(DefaultServlet.class, "/");
+		// The tmp directory is symlinked on OS X
+		holder.setInitParameter("aliases", "true");
 		server.setUp();
 
 		remoteRepository = src.getRepository();

org.eclipse.jgit.http.test/tst/org/eclipse/jgit/http/test/GitServletInitTest.java

 		ServletHolder s = app.addServlet(GitServlet.class, "/git");
 		s.setInitOrder(1);
 		s.getServletHandler().setStartWithUnavailable(false);
+		// The tmp directory is symlinked on OS X
+		s.setInitParameter("aliases", "true");
 
 		try {
 			server.setUp();
 		s.setInitOrder(1);
 		s.setInitParameter("base-path", ".");
 		s.setInitParameter("export-all", "true");
+		// The tmp directory is symlinked on OS X
+		s.setInitParameter("aliases", "true");
 
 		server.setUp();
 		assertTrue("no warnings", RecordingLogger.getWarnings().isEmpty());

org.eclipse.jgit.http.test/tst/org/eclipse/jgit/http/test/HttpClientTests.java

 
 		ServletContextHandler ctx = server.addContext(path);
 		ctx.setResourceBase(base.toString());
-		ctx.addServlet(DefaultServlet.class, "/");
+		ServletHolder holder = ctx.addServlet(DefaultServlet.class, "/");
+		// The tmp directory is symlinked on OS X
+		holder.setInitParameter("aliases", "true");
 		return ctx;
 	}
 

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/FileRepositoryBuilderTest.java

 		builder.setMustExist(true);
 		Repository repo2 = builder.build();
 
-		assertEquals(repo1.getDirectory(), repo2.getDirectory());
+		// The tmp directory may be a symlink so the actual path
+		// may not
+		assertEquals(repo1.getDirectory().getCanonicalPath(), repo2
+				.getDirectory().getCanonicalPath());
 		assertEquals(dir, repo2.getWorkTree());
 	}
 
 		builder.setMustExist(true);
 		Repository repo2 = builder.build();
 
-		assertEquals(repo1.getDirectory(), repo2.getDirectory());
+		// The tmp directory may be a symlink
+		assertEquals(repo1.getDirectory().getCanonicalPath(), repo2
+				.getDirectory().getCanonicalPath());
 		assertEquals(dir, repo2.getWorkTree());
 	}
 }