Change default values for signer --sequencer_interval and --batch_size
Change default values for signer --sequencer_interval and --batch_size

Reduce sequencer interval from 10 seconds to 100 milliseconds.
Increase batch size from 50 to 1000.

These two changes will vastly increase the signer's throughput and latency
out-of-the-box. The previous defaults would cause the integration test to
fail because the signer sequenced too slowly (integration/functions.sh
overrides the default values to avoid this).

daviddrysdale/trillian,Martin2112/trillian,google/trillian,daviddrysdale/trillian,RJPercival/trillian,gdbelvin/trillian,AlCutter/trillian,AlCutter/trillian,Martin2112/trillian,RJPercival/trillian,daviddrysdale/trillian,google/trillian,gdbelvin/trillian,gdbelvin/trillian,Martin2112/trillian