Add noInterop option to babel-plugin-transform-es2015-modules-commonjs.

The intent of this option is to toggle module interop behavior. When `true`
no `interopRequireXXX` helper invocations will be emitted.

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-export-from/actual.js

@@ -0,0 +1 @@
+export { default } from 'foo';

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-export-from/expected.js

@@ -0,0 +1,13 @@
+define(['exports', 'foo'], function (exports, _foo) {
+  'use strict';
+
+  Object.defineProperty(exports, "__esModule", {
+    value: true
+  });
+  Object.defineProperty(exports, 'default', {
+    enumerable: true,
+    get: function () {
+      return _foo.default;
+    }
+  });
+});

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-export-from/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", ["transform-es2015-modules-amd", { "noInterop": true }]]
+}

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-import-default-only/actual.js

@@ -0,0 +1,3 @@
+import foo from "foo";
+
+foo;

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-import-default-only/expected.js

@@ -0,0 +1,5 @@
+define(["foo"], function (_foo) {
+  "use strict";
+
+  _foo.default;
+});

packages/babel-plugin-transform-es2015-modules-amd/test/fixtures/amd/noInterop-import-default-only/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", ["transform-es2015-modules-amd", { "noInterop": true }]]
+}