fix warnings and BinaryWriter test fail

Author: sayjeyhi

commonjs/rewrite_tests_for_commonjs.js

@@ -67,7 +67,7 @@ console.log("var global = Function('return this')();");
 console.log("var googleProtobuf = require('google-protobuf');");
 console.log("var testdeps = require('testdeps_commonjs');");
 console.log("global.goog = testdeps.goog;");
-console.log("global.jspb = googleProtobuf.jspb;");
+console.log("global.jspb = googleProtobuf;");
 console.log("var asserts = require('closure_asserts_commonjs');");
 console.log("");
 console.log("// Bring asserts into the global namespace.");

maps_test.js

@@ -29,6 +29,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 goog.require('goog.testing.asserts');
+goog.require('goog.testing.TestCase');
 goog.require('goog.userAgent');
 
 // CommonJS-LoadFromFile: testbinary_pb proto.jspb.test

message_test.js

@@ -34,6 +34,7 @@ goog.setTestOnly();
 
 goog.require('goog.testing.PropertyReplacer');
 goog.require('goog.testing.asserts');
+goog.require('goog.testing.TestCase');
 goog.require('goog.userAgent');
 
 // CommonJS-LoadFromFile: google-protobuf jspb