Function holochain::test_utils::consistency_dbs

pub async fn consistency_dbs<AuthorDb, DhtDb>(
    all_cell_dbs: &[(&AgentPubKey, &AuthorDb, &DhtDb)],
    num_attempts: usize,
    delay: Duration
) where
    AuthorDb: ReadAccess<DbKindAuthored>,
    DhtDb: ReadAccess<DbKindDht>, 

Wait for all cell envs to reach consistency