testing runtests on scipy.

[rainwoodman]

After the switch to pytests, runtests works perfect on scipy. Here is a result on a recent scipy master:

../testenv/lib/python3.5/site-packages/scipy/stats/tests/test_stats.py ...
../testenv/lib/python3.5/site-packages/scipy/signal/tests/test_cont2discrete.py .
../testenv/lib/python3.5/site-packages/scipy/ndimage/tests/test_ndimage.py .....
../testenv/lib/python3.5/site-packages/scipy/ndimage/tests/test_regression.py .
../testenv/lib/python3.5/site-packages/scipy/ndimage/tests/test_ndimage.py ..
../testenv/lib/python3.5/site-packages/scipy/stats/tests/test_mstats_basic.py ..
../testenv/lib/python3.5/site-packages/scipy/stats/tests/test_stats.py ...
../testenv/lib/python3.5/site-packages/scipy/integrate/tests/test_integrate.py .

==================================================================== FAILURES =====================================================================
___________________________________________________________________ test_m_gt_n ___________________________________________________________________

    def test_m_gt_n():
        m, n = 20, 10
        A0 = np.random.rand(m, n)
        b0 = np.random.rand(m)
        x = np.linalg.solve(A0[:n, :], b0[:n])
        b0[n:] = A0[n:, :].dot(x)
        A1, b1, status, message = _remove_redundancy(A0, b0)
>       assert_equal(status, 0)
E       AssertionError: 
E       Items are not equal:
E        ACTUAL: 2
E        DESIRED: 0

A0         = array([[ 0.24297605,  0.17140034,  0.47149368,  0.06648691,  0.02579971,
         0.19907105,  0.21822714,  0.72560196...6688,  0.39023403,  0.44435329,  0.83206927,
         0.32256582,  0.7784098 ,  0.82310553,  0.67136597,  0.35044346]])
A1         = array([[ 0.04532157,  0.27156247,  0.96293061,  0.21386475,  0.55672186,
         0.75980493,  0.3659801 ,  0.66733478...6688,  0.39023403,  0.44435329,  0.83206927,
         0.32256582,  0.7784098 ,  0.82310553,  0.67136597,  0.35044346]])
b0         = array([  8.95969352e-02,   7.72259379e-01,   3.65285625e-01,
         2.40855892e-01,   6.44855340e-01,   9.60533893e-....36451428e+01,
        -9.06567384e+01,   4.81493015e+01,  -8.09728492e+01,
        -5.51290917e+00,  -6.56066155e+01])
b1         = array([   0.24085589,    0.64485534,    0.96053389,    0.54116465,
          0.2661602 ,    0.5552781 ,    0.33257113,...  -1.83978221,  -23.64514282,
        -90.65673839,   48.14930153,  -80.97284915,   -5.51290917,
        -65.60661546])
m          = 20
message    = 'There is a linear combination of rows of A_eq that results in zero, suggesting a redundant constraint. However the same linear combination of b_eq is nonzero, suggesting that the constraints conflict and the problem is infeasible.'
n          = 10
status     = 2
x          = array([   4.86326418,    4.91417184,  -60.36820093,  -27.538317  ,
        -94.60761231,  -37.46459654,  -43.06280074,   29.2083314 ,
         31.15406987,  130.43177028])

../testenv/lib/python3.5/site-packages/scipy/optimize/tests/test__remove_redundancy.py:114: AssertionError
================================= 1 failed, 12608 passed, 1347 skipped, 123 xfailed, 5 xpassed in 739.08 seconds =========