unifrac/unifrac-tools autopkgtest failure

[Vladimir Petko]

See:
https://autopkgtest.ubuntu.com/results/autopkgtest-mantic/mantic/amd64/u/unifrac/20230930_111936_3decc@/log.gz

There are multiple issues:
 - unifrac autopkgtest try to compare np.array of size 1 with a scalar. Should be comparing first element.
 - assertEquals should be replaced with assertAlmostEquals()
 - unifrac-tools should correctly initialize node_properties vector in src/unifrac_internal.cpp:176 set_proportions(), division by zero causes undefined behaviour.

Note: S390x build fails since lunar

[Vladimir Petko (vpa1977)]

https://github.com/biocore/unifrac-binaries/issues/51

[Vladimir Petko (vpa1977)]

https://github.com/biocore/unifrac/issues/156

[Vladimir Petko (vpa1977)]

https://github.com/biocore/unifrac/issues/157

[Vladimir Petko (vpa1977)]

Upstream patch: https://github.com/biocore/unifrac-binaries/pull/53