Revive test_require.js (#949)

Details:
 * Add this test to the testrunner as `test_module_require.js`.
 * Move module `process` related code into `test_process_readsource.js`.
 ** Move the used JSON-file to `test/resources/process/`.

IoT.js-DCO-1.0-Signed-off-by: Zsolt Borbély [email protected]

Author: Zsolt Borbély

test/run_pass/require1/package.json renamed to test/resources/process/package.json

@@ -17,8 +17,6 @@
   @NOTEST
 */
 
-var x = require("buffer");
-
 exports.add = function(a, b) {
   return a + b;
 };

test/run_pass/require1/node_modules/test_index/package.json

@@ -0,0 +1,3 @@
+{
+  "main": "index_test"
+}