build: e2e test timeout due to missing systemjs map (#10130)
build: e2e test timeout due to missing systemjs map (#10130)

Fixes the e2e tests currently timing out, because the e2e app throws a runtime error due to a missing mapping for the `tree` in the SystemJS config.
Jefiozie/material2,jelbourn/material2,crisbeto/material2,crisbeto/material2,mmalerba/material2,josephperrott/material2,mmalerba/material2,jelbourn/material2,angular/components,crisbeto/material2,tinayuangao/material2,angular/components,DevVersion/material2,DevVersion/material2,ppham27/material2,jelbourn/material2,mmalerba/material2,DevVersion/material2,josephperrott/material2,jelbourn/material2,mmalerba/material2,andrewseguin/material2,andrewseguin/material2,angular/components,andrewseguin/material2,Jefiozie/material2,josephperrott/material2,amcdnl/material2,andrewseguin/material2,ppham27/material2,tinayuangao/material2,ppham27/material2,mmalerba/material2,crisbeto/material2,angular/components,josephperrott/material2,amcdnl/material2,tinayuangao/material2,amcdnl/material2,ppham27/material2,amcdnl/material2,tinayuangao/material2,josephperrott/material2,jelbourn/material2,ppham27/material2,Jefiozie/material2,Jefiozie/material2,DevVersion/material2,DevVersion/material2,andrewseguin/material2,Jefiozie/material2,amcdnl/material2,tinayuangao/material2