Bazel: Add missing dependency in org.eclipse.jgit.http.test

Change-Id: I255af794856371fdf1a1eceb6bca50a35b71b519
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.http.test/BUILD

@@ -34,6 +34,7 @@ java_library(
     srcs = glob(["src/**/*.java"]),
     deps = [
         "//lib:junit",
+        "//lib:servlet-api",
         "//org.eclipse.jgit.http.server:jgit-servlet",
         "//org.eclipse.jgit:jgit",
         "//org.eclipse.jgit.junit.http:junit-http",