Two fixes:
1. test_trampoline_mpp_consolidation: set dave.MPP_EXPIRY=120 when
test_mpp_consolidation=True. With MPP_EXPIRY=2s and sequential HTLC
commitment rounds, Dave times out before the second HTLC arrives.
2. test_reestablish_fake_data: use explicit Task references in the
payment setup phase so that loop tasks (message loops, htlc_switch)
are cancelled in a finally block regardless of whether pay() succeeds
or raises. Without this, asyncio.gather leaves orphaned tasks running
across sub-test iterations when a payment fails, causing interference
davide
7d433d0b44