[react-packager] Support packages with '.' in the name

Summary:
@public
Fixes issue #1055
For some historical reason we used to strip the extension of the module name before passing it to `resolveDependency` which is completly capable of handling all kinds of names. The fix is one line, but added a few tests for this.

Test Plan:
* ./runJestTests.sh
* ./runJestTests.sh PacakgerIntegration
* Open app and click around

packager/react-packager/src/DependencyResolver/haste/DependencyGraph/__tests__/DependencyGraph-test.js

@@ -577,6 +577,80 @@ describe('DependencyGraph', function() {
       });
     });
 
+    pit('should work with packages with a dot in the name', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.js': [
+            '/**',
+            ' * @providesModule index',
+            ' */',
+            'require("sha.js")',
+            'require("x.y.z")',
+          ].join('\n'),
+          'sha.js': {
+            'package.json': JSON.stringify({
+              name: 'sha.js',
+              main: 'main.js'
+            }),
+            'main.js': 'lol'
+          },
+          'x.y.z': {
+            'package.json': JSON.stringify({
+              name: 'x.y.z',
+              main: 'main.js'
+            }),
+            'main.js': 'lol'
+          }
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher,
+        assetExts: ['png', 'jpg'],
+      });
+      return dgraph.getOrderedDependencies('/root/index.js').then(function(deps) {
+        expect(getDataFromModules(deps))
+          .toEqual([
+            {
+              id: 'index',
+              altId: '/root/index.js',
+              path: '/root/index.js',
+              dependencies: ['sha.js', 'x.y.z'],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: undefined,
+              isPolyfill: false,
+              resolution: undefined,
+              resolveDependency: undefined,
+            },
+            {
+              id: 'sha.js/main',
+              path: '/root/sha.js/main.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: undefined,
+              isPolyfill: false,
+              resolution: undefined,
+              resolveDependency: undefined,
+            },
+            {
+              id: 'x.y.z/main',
+              path: '/root/x.y.z/main.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: undefined,
+              isPolyfill: false,
+              resolution: undefined,
+              resolveDependency: undefined,
+            },
+          ]);
+      });
+    });
+
     pit('should default main package to index.js', function() {
       var root = '/root';
       fs.__setMockFilesystem({
@@ -2116,6 +2190,63 @@ describe('DependencyGraph', function() {
           ]);
       });
     });
+
+    pit('should work with node packages with a .js in the name', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.js': [
+            '/**',
+            ' * @providesModule index',
+            ' */',
+            'require("sha.js")',
+          ].join('\n'),
+          'node_modules': {
+            'sha.js': {
+              'package.json': JSON.stringify({
+                name: 'sha.js',
+                main: 'main.js'
+              }),
+              'main.js': 'lol'
+            }
+          }
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher,
+        assetExts: ['png', 'jpg'],
+      });
+      return dgraph.getOrderedDependencies('/root/index.js').then(function(deps) {
+        expect(getDataFromModules(deps))
+          .toEqual([
+            {
+              id: 'index',
+              altId: '/root/index.js',
+              path: '/root/index.js',
+              dependencies: ['sha.js'],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: undefined,
+              isPolyfill: false,
+              resolution: undefined,
+              resolveDependency: undefined,
+            },
+            {
+              id: 'sha.js/main',
+              path: '/root/node_modules/sha.js/main.js',
+              dependencies: [],
+              isAsset: false,
+              isAsset_DEPRECATED: false,
+              isJSON: undefined,
+              isPolyfill: false,
+              resolution: undefined,
+              resolveDependency: undefined,
+            },
+          ]);
+      });
+    });
   });
 
   describe('file watch updating', function() {

packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js

@@ -144,8 +144,7 @@ DependecyGraph.prototype.getOrderedDependencies = function(entryPath) {
     function iter(mod) {
       var p = Promise.resolve();
       mod.dependencies.forEach(function(name) {
-        var id = sansExtJs(name);
+        var dep = self.resolveDependency(mod, name);
-        var dep = self.resolveDependency(mod, id);
 
         if (dep == null) {
           debug(