fix(perf): support prod mode again

After splitting the facades into multiple modules,
enabling prod mode for code had no effect for the compiler.

Also in a change between RC1 and RC2 we created the `CompilerConfig`
via a provider with `useValue` and not via a `useFactory`, which reads
the prod mode too early.

Closes #9318
Closes #8508
Closes #9318

modules/@angular/core/testing/test_injector.ts

@@ -1,4 +1,5 @@
 import {PLATFORM_INITIALIZER, Provider, ReflectiveInjector, Type} from '../index';
+import {lockRunMode} from '../src/application_ref';
 import {ListWrapper} from '../src/facade/collection';
 import {BaseException} from '../src/facade/exceptions';
 import {FunctionWrapper, isPresent} from '../src/facade/lang';
@@ -33,6 +34,7 @@ export class TestInjector {
   }
 
   createInjector() {
+    lockRunMode();
     var rootInjector = ReflectiveInjector.resolveAndCreate(this.platformProviders);
     this._injector = rootInjector.resolveAndCreateChild(
         ListWrapper.concat(this.applicationProviders, this._providers));