Add flushing caches after successful extension import

4 jobs for 365-cache-shows-old-extension-version-after-upload in 6 minutes and 46 seconds
Status Job ID Name Coverage
  Test
passed #9608
test:php

00:00:21

passed #9607
test:unit

00:01:57

 
  Build
passed #9609
build

00:02:05

 
  Layout
passed #9610
layout

00:02:43