[PATCH] test: use the python interpreter in sh.config

[David Bremner]

David Bremner <david at tethera.net> writes:

> The configure script chooses "python" if both python and python{2,3}
> exist exists, so this could change the version of python used to run
> the test suite.
>
> The checking for ${NOTMUCH_PYTHON} in the test suite is arguably
> over-engineering, since the configure step will fail if it can't find
> it.

pushed.

d