Fix the deployment issue caused by incorrectly referencing 'webpack-externals-plugin' when it should be 'webpack-node-externals'

Author: SteveSandersonMS

templates/Angular2Spa/package.json

@@ -36,7 +36,7 @@
     "typescript": "^2.0.0",
     "url-loader": "^0.5.7",
     "webpack": "^1.12.14",
-    "webpack-externals-plugin": "^1.0.0",
+    "webpack-node-externals": "^1.4.3",
     "webpack-hot-middleware": "^2.10.0",
     "webpack-merge": "^0.14.1",
     "zone.js": "^0.6.21"

templates/ReactReduxSpa/package.json

@@ -29,7 +29,7 @@
     "typescript": "^1.8.2",
     "url-loader": "^0.5.7",
     "webpack": "^1.12.14",
-    "webpack-externals-plugin": "^1.0.0",
+    "webpack-node-externals": "^1.4.3",
     "webpack-hot-middleware": "^2.10.0",
     "webpack-merge": "^0.14.1"
   }