OZG-2737 OZG-2950 fix/adjust E2E Tests; cleanup

Jenkinsfile

goofy-client/apps/goofy-e2e/cypress.json

goofy-client/apps/goofy-e2e/docker-compose.yml

...-client/apps/goofy-e2e/src/fixtures/user/user_sabine.json

...y-e2e/src/fixtures/usermanager/usermanager_user_emil.json

...-e2e/src/fixtures/usermanager/usermanager_user_peter.json

...e2e/src/fixtures/usermanager/usermanager_user_sabine.json

...tlicher-ansprechpartner/navigation/navigation.e2e-spec.ts

...-e2e/src/integration/main-tests/app/buildinfo.e2e-spec.ts

.../src/integration/main-tests/historie/historie.e2e-spec.ts

...rc/integration/main-tests/kommentar/kommentar.e2e-spec.ts

.../integration/main-tests/navigation/navigation.e2e-spec.ts

...ser-profile/user-profile-icon-assign-unassign.e2e-spec.ts

...user-profile-icon-in-postfach-nachricht-error.e2e-spec.ts

...er-profile/user-profile-icon-in-vorgang-error.e2e-spec.ts

...ration/main-tests/user-settings/user-settings.e2e-spec.ts

.../vorgang-detailansicht/vorgang-zurueckstellen.e2e-spec.ts

goofy-client/apps/goofy-e2e/src/model/usermanager.ts

goofy-client/apps/goofy-e2e/src/plugins/index.js

goofy-client/apps/goofy-e2e/src/support/commands.ts