Diagnose when CIs started failing

[guyer]

Tests used to pass, but then they stopped.

[guyer]

Difference in conda environment between first commit (passed test-36-scipy) and second commit (failed):

% Date: 2021-09-17 10:22:40 - 21 differences
%	/Users/guyer/Library/Preferences/Alpha-v9/tmp/Diff/passed-temp1
%	/Users/guyer/Library/Preferences/Alpha-v9/tmp/Diff/failed-temp1
% Use up and down arrows to move through differences, ⌃⌥-left and ⌃⌥-right to patch changes from one window to the other.
10c10
<   - _openmp_mutex=4.5=1_llvm
---
>   - _openmp_mutex=4.5=1_gnu

28a29,32
>   - font-ttf-dejavu-sans-mono=2.37=hab24e00_0
>   - font-ttf-inconsolata=3.000=h77eed37_0
>   - font-ttf-source-code-pro=2.038=h77eed37_0
>   - font-ttf-ubuntu=0.83=hab24e00_0

29a34,36
>   - fonts-conda-ecosystem=1=0
>   - fonts-conda-forge=1=0
>   - freeimage=3.18.0=h88c329d_7

38c45
<   - gmsh=3.0.6=he2a7a22_2
---
>   - gmsh=4.8.4=h2ad51fa_0

45a53
>   - ilmbase=2.5.5=h780b84a_0

52a61
>   - jxrlib=1.1=h7f98852_2

59,60c68,69
<   - libblas=3.9.0=8_mkl
<   - libcblas=3.9.0=8_mkl
---
>   - libblas=3.9.0=11_linux64_openblas
>   - libcblas=3.9.0=11_linux64_openblas

69d77
<   - libgfortran=3.0.0=1

73a82
>   - libgomp=11.2.0=h1d223b6_8

75c84
<   - liblapack=3.9.0=8_mkl
---
>   - liblapack=3.9.0=11_linux64_openblas

79a89
>   - libopenblas=0.3.17=pthreads_h8fe5266_1

82a93
>   - libraw=0.20.2=h10796ff_1

94d104
<   - llvm-openmp=12.0.1=h4bd325d_1

100d109
<   - mkl=2020.4=h726a3e6_304

114c123
<   - occt=7.3.0=h3be52bf_1005
---
>   - occt=7.5.2=h7391655_0

116c125
<   - openblas=0.2.20=8
---
>   - openexr=2.5.5=hf817b99_0

141a151
>   - rapidjson=1.1.0=he1b5a44_1002

163a174
>   - xorg-fixesproto=5.0=h7f98852_1002

170a182
>   - xorg-libxfixes=5.0.3=h7f98852_1004

171a184
>   - xorg-libxrender=0.9.10=h7f98852_1003

172a186
>   - xorg-renderproto=0.11.1=h7f98852_1002

Fails due to time-out. Most likely difference is lib[c]blas=3.9.0=8_mkl vs. lib[c]blas=3.9.0=11_linux64_openblas?

[guyer]

Switching to Azure, which doesn't fail.