move testing utils into @nrwl/nx/testing

src/index.ts

@@ -1,2 +0,0 @@
-export { readAll } from './utils/testing';
-export { hot, cold } from 'jasmine-marbles';

src/schematics/addNgRxToModule/files/+state/__fileName__.effects.spec.ts__tmpl__

@@ -1,5 +1,5 @@
 import {Actions} from '@ngrx/effects';
-import {readAll, hot} from '@nrwl/nx';
+import {readAll, hot} from '@nrwl/nx/testing';
 import {<%= className %>Effects} from './<%= fileName %>.effects';
 import {of} from 'rxjs/observable/of';
 

src/testing.ts

@@ -0,0 +1,2 @@
+export { readAll } from './utils/testing';
+export { hot, cold } from 'jasmine-marbles';