Wait and retry if pre-defined user login fails

test/tests.bats

@@ -1212,6 +1212,11 @@ load 'test_helper/bats-assert/load'
 
 
 @test "checking user login: predefined user can login" {
+  # This should really not be necessary, but this test sometimes fails, probably due to timing
+  if ! (docker exec mail doveadm auth test -x service=smtp pass@localhost.localdomain 'may be \a `p^a.*ssword' >/dev/null); then
+    sleep 60
+  fi
+
   result=$(docker exec mail doveadm auth test -x service=smtp pass@localhost.localdomain 'may be \a `p^a.*ssword' | grep 'auth succeeded')
   [ "$result" = "passdb: pass@localhost.localdomain auth succeeded" ]
 }