Returns the hash type.

Hash type, batch size and symlink strategy.

Newer versions of pylint complain.

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This uses the Queue rather than dequeue, allowing request_job_leases to block
until a specified timeout.

Use grpc time outs and ability to wait on jobs to have the server hang pending
on a job coming through. This reduces the need for constant update requests
while still responding to new jobs quickly.

Bot will periodically attempt to reconnect if a controller goes down.
If a job is running it will similar to the server side, wait on the job
completing else respond periodically.

This logic may need changing if/when bots can have multiple leases.