test_adapter occasionally failing

This test spawns two threads in order to trigger a serialization database exception. It looks like occasionally the serialization exception is not being raised because the other thread is raising an exception instead.

This test is temporarily disabled until I get a chance to look at it. It is not an urgent fix until Bug #31478 is sorted out.

File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/lib/canonical/launchpad/webapp/ftests/test_adapter.txt", line 367, in test_adapter.txt

Failed example:

    print task1.traceback

Differences (ndiff with -expected +actual):

    + Failed to trigger serialization exception

    - Traceback (most recent call last):

    - ...

    - Retry: ...

----------------------------------------------------------------------

File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/lib/canonical/launchpad/webapp/ftests/test_adapter.txt", line 371, in test_adapter.txt

Failed example:

    print task2.traceback

Differences (ndiff with -expected +actual):

    - None

    + Traceback (most recent call last):

    + File "<doctest test_adapter.txt[110]>", line 9, in run

    + transaction.commit()

    + File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/database/schema/../../lib/transaction/__init__.py", line 31, in commit

    + manager.get().commit(sub)

    + File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/database/schema/../../lib/transaction/_transaction.py", line 293, in commit

    + self._commitResources(subtransaction)

    + File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/database/schema/../../lib/transaction/_transaction.py", line 345, in _commitResources

    + rm.tpc_finish(self)

    + File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/database/schema/../../lib/transaction/_transaction.py", line 625, in tpc_finish

    + self._datamanager.commit(transaction)

    + File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/database/schema/../../lib/sqlos/transaction/__init__.py", line 182, in commit

    + self.sqlconnection.commit()

    + File "/home/pqm/arch/queue/workdir/home/---devel/launchpad/lib/canonical/ftests/pgsql.py", line 65, in commit

    + return self.__dict__['real_connection'].commit()

    + InterfaceError: already closed

    + <BLANKLINE>