Python3 transitions breaking dependencies of postgresql-pgm

[Christian Ehrhardt ]

Current tests fail
- https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/amd64/p/postgresql-pgmp/20200128_212049_fc961@/log.gz
- https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/s390x/p/postgresql-pgmp/20200128_215135_2a985@/log.gz

Example:
autopkgtest: WARNING: package postgresql-12-pgmp is not installed though it should be
autopkgtest: WARNING: Test dependencies are unsatisfiable - calling apt install on test deps directly for further data about failing dependencies in test logs
Reading package lists...
Building dependency tree...
Reading state information...
Package python is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  2to3 python2-minimal:i386 python2:i386 python2-minimal python2

E: Package 'python' has no installation candidate
installcheck FAIL badpkg

Upstream isn't ready for python3 yet
=> https://github.com/dvarrazzo/pgmp/issues/16

For now make it an explicit python2 case to unbreak dependencies and tests.

[Christian Ehrhardt  (paelzer)]

Uploaded to focal, lets see how things migrate in some hours

[Launchpad Janitor (janitor)]

This bug was fixed in the package postgresql-pgmp - 1.0.2-8ubuntu1

---------------
postgresql-pgmp (1.0.2-8ubuntu1) focal; urgency=medium

  * explicitly use python2 until python3 is supported (LP: #1861273)
    - d/control[.in]: bump build dependencies to explcit 2
    - d/p/use-python2.patch: update script headers to call python2
    - d/t/control: bump test dependencies to explcit 2

 -- Christian Ehrhardt <email address hidden> Wed, 29 Jan 2020 12:27:31 +0100