Make bazel build fully hermetic

We no longer reference @bazel_tools//third_party. All of our transitive
dependencies are now specified explicitly in our WORKSPACE file.

I also fixed the way that jar dependencies are exported, so we don't
break strict dependency checking.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=116421176

third_party/java/apache_mina/BUILD

@@ -4,8 +4,6 @@ licenses(["notice"])  # Apache License 2.0
 
 java_library(
     name = "core",
-    exports = [
-        "@mina_core//jar",
-        "//third_party/java/slf4j_api",
-    ],
+    exports = ["@mina_core//jar"],
+    runtime_deps = ["//third_party/java/slf4j_api"],
 )