Bug#1149823: scotch: FTBFS: 81% tests passed, 33 tests failed out of 171

[Santiago Vila]

Hi.

Note that version 7.0.15-3 did this change:

PRTE_MCA_rmaps_default_mapping_policy -> PRTE_MCA_mapby

only in debian/tests/test-scotch, but in debian/rules
the old env variable is still being used.

(I have not checked if doing so in debian/rules improves things,
I would expect a cleaner build log at a minimum).

Thanks.