[merge][trivial] relax timing-dependent lock test

[Martin Pool]

It looks like test_35_lock_wait_changing can timeout and fail on a
slow or heavily loaded machine; this just relaxes the timeout.

-- 
Martin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 200708160116Z-trivial.diff
Type: text/x-diff
Size: 2100 bytes
Desc: not available
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20070816/049243e0/attachment.bin