[Debian-astro-maintainers] Bug#868119: ccdproc broken with astropy 2.0

[Ole Streicher]

Package: ccdproc
Version: 1.2.0-1
Severity: serious
Control: block 868113 by -1

https://ci.debian.net/data/autopkgtest/unstable/amd64/c/ccdproc/20170712_000059/log.gz

>From the CI log:
adt-run [00:03:43]: test python3-ccdproc: [-----------------------
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/_pytest/config.py", line 325, in _getconftestmodules
    return self._path2confmods[path]
KeyError: local('/usr/lib/python3/dist-packages/ccdproc')

During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/_pytest/config.py", line 356, in _importconftest
    return self._conftestpath2mod[conftestpath]
KeyError: local('/usr/lib/python3/dist-packages/ccdproc/conftest.py')

During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/_pytest/config.py", line 362, in _importconftest
    mod = conftestpath.pyimport()
  File "/usr/lib/python3/dist-packages/py/_path/local.py", line 662, in pyimport
    __import__(modname)
  File "/usr/lib/python3/dist-packages/_pytest/assertion/rewrite.py", line 216, in load_module
    py.builtin.exec_(co, mod.__dict__)
  File "/usr/lib/python3/dist-packages/ccdproc/conftest.py", line 8, in <module>
    from .tests.pytest_fixtures import *
  File "/usr/lib/python3/dist-packages/ccdproc/tests/pytest_fixtures.py", line 15, in <module>
    from astropy.utils.compat import gzip
ImportError: cannot import name 'gzip'
ERROR: could not load /usr/lib/python3/dist-packages/ccdproc/conftest.py