test_vault: increase WAIT_AFTER_ARCHIVE
Fixes failing "ipa vault-retrieve" on replica due to a vault
not yet replicated. Increase from 30 to 45 seems to be enough.
https://pagure.io/freeipa/issue/7265
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>