Fix/frontend admin tests (#5935)

* Add missing awaits.

* Remove rate limiter.

* Readded maxHttpBuffersize.

* Revert "Add missing awaits."

This reverts commit d5a8979841.

* Increased timeout.

* Increased timeout further.

* Toggled down timeout.

* Add importExportRateLimit.

src/tests/frontend/travis/runnerLoadTest.sh

@@ -15,6 +15,8 @@ try() { "$@" || fatal "'$@' failed"; }
 MY_DIR=$(try cd "${0%/*}" && try pwd -P) || exit 1
 try cd "${MY_DIR}/../../../.."
 
+sed -e '/^ *"importExportRateLimiting":/,/^ *\}/ s/"max":.*/"max": 100000000/' -i settings.json.template
+
 try sed -e '
 s!"loadTest":[^,]*!"loadTest": true!
 # Reduce rate limit aggressiveness