Creates a new ledger asynchronously. Ledgers created with this call have
a separate write quorum and ack quorum size. The write quorum must be larger than
the ack quorum.
Separating the write and the ack quorum allows the BookKeeper client to continue
writing when a bookie has failed but the failure has not yet been detected. Detecting
a bookie has failed can take a number of seconds, as configured by the read timeout
ClientConfiguration#getReadTimeout(). Once the bookie failure is detected,
that bookie will be removed from the ensemble.
The other parameters match those of