functional_tests: Ensure that backups app is installed before test

Signed-off-by: James Valleroy <jvalleroy@mailbox.org>
2 jobs for backups-epic in 12 minutes and 30 seconds (queued for 17 seconds)
Status Job ID Name Coverage
  Test
passed #46103
run-unit-tests

00:05:34

23.38%
 
  Package
passed #46104
build-debian-package

00:06:56