[ADF-2147] test upgrade 2.0.0 (#2902)

* add integration 2.0.0 test

* update readme

* add integration test in travis

* restore tsconfig.dev

* fix test script travis call

* improve script

* fix npm run test

integration/base_ver_2_app/src/environments/environment.ts

@@ -0,0 +1,8 @@
+// The file contents for the current environment will overwrite these during build.
+// The build system defaults to the dev environment which uses `environment.ts`, but if you do
+// `ng build --env=prod` then `environment.prod.ts` will be used instead.
+// The list of which env maps to which file can be found in `.angular-cli.json`.
+
+export const environment = {
+  production: false
+};