sync against u1db-serve pegs the at 100% forever

[Lucio Torre]

Get lai.py from: https://gist.github.com/3085488

(env)$ u1db-client init-db server.u1db
(env)$ u1db-serve --port=9000

On another terminal:
(env)$ python lai.py --add-for-test 50
(env)$ python lai.py --sync

u1db-sync will peg the cpu for a while (not enough patience to see if it finishes). (400 docs should be cheap)

normally, sync when done with less than 48 items takes less than a second. with 48 items it never finishes.

(u1db)lucio@prometeo:~/canonical/tmp$ python lai.py --add-for-test 46
(u1db)lucio@prometeo:~/canonical/tmp$ python lai.py --sync
(u1db)lucio@prometeo:~/canonical/tmp$ python lai.py --add-for-test 47
(u1db)lucio@prometeo:~/canonical/tmp$ python lai.py --sync
(u1db)lucio@prometeo:~/canonical/tmp$ python lai.py --add-for-test 48
(u1db)lucio@prometeo:~/canonical/tmp$ python lai.py --sync
<never finishes>

[Lucio Torre (lucio.torre)]

Works with trunk, tried up to 5k docs.

This is the lai.py version updated to with with the new apis:
https://gist.github.com/3085870