[Migrillian] Re-create batches channel on each Run (#271)
[Migrillian] Re-create batches channel on each Run (#271)

Run method can be executed multiple times. Create the channel each time
to avoid getting double-close situation.
RJPercival/certificate-transparency-go,RJPercival/certificate-transparency-go,google/certificate-transparency-go,RJPercival/certificate-transparency-go,daviddrysdale/certificate-transparency-go,google/certificate-transparency-go,google/certificate-transparency-go,daviddrysdale/certificate-transparency-go,daviddrysdale/certificate-transparency-go