title: How can I navigate to lazy loaded module child routes?
body: <p>I am trying to lazy load module with child routes declared in it's routing configuration file,
  The lazy module loaded successfully but I can't navigate to it's child routes.</p>
  
  <p>I am using the technique as if it were a eagerly loaded module.
  I declared path and inside it it's children.
  Please see 'moduleB' routing file in the Plunker 
  The link button is trying to navigate to the child route and load CmpC. but it fails. </p>
  
  <p>Here is my root module routing decalration:</p>
  
  <pre><code>{ path: 'feature-b', loadChildren:'src/featureB/featureB.module#FeatureBModule' ,  pathMatch: 'full'}
  </code></pre>
  
  <p>Here is my lazy loaded module routing declaration.</p>
  
  <pre><code>export const moduleBRoutes: Routes = [
  
    { path: '', component:CmpC , pathMatch: 'full',children:[
        {path: '' , pathMatch: 'full'},
        { path: 'c', component:CmpB , pathMatch: 'full'}
    ]},
  
  ];
  
  export const subRouting: ModuleWithProviders = RouterModule.forChild(moduleBRoutes);
  </code></pre>
  
  <p>trying to navigate to : localhost:999/feature-b succeeded</p>
  
  <p>trying to navigate to : localhost:999/feature-b/c failed</p>
  
  <p><a href="https://plnkr.co/edit/wFlJoDXRmAlMOswmwWFk?p=preview" rel="noreferrer">https://plnkr.co/edit/wFlJoDXRmAlMOswmwWFk?p=preview</a></p>