ceph-volume: add "packaging" to install_requires

in 0985e20, "packaging" was introduced as a runtime dependency of
ceph-volume, and `ceph.spec.in` was updated accordingly to note
this new dependency. but the debian packaging was not updated.

in 80edcd4, the missing dependency was added to debian/control as
one of ceph-volume's runtime dependency.

but dh_python3 is able to figure out the dependencies by reading
the egg's metadata of the ceph-volume python module. and as a
python project, ceph-volume is using its `setup.py` for
tracking its dependencies.

so in order to be more consistent, and keep all of its dependencies
in one place, let's move this dependency to setup.py . as the
packagings in both distros are able to figure the dependencies
from egg-info.

see also
- https://manpages.debian.org/testing/dh-python/dh_python3.1.en.html#dependencies
- https://docs.fedoraproject.org/en-US/packaging-guidelines/Python_201x/#_automatically_generated_dependencies

Signed-off-by: Kefu Chai <[email protected]>

Author: tchaikov

ceph.spec.in

@@ -977,7 +977,6 @@ Requires: parted
 Requires: util-linux
 Requires: xfsprogs
 Requires: python%{python3_pkgversion}-setuptools
-Requires: python%{python3_pkgversion}-packaging
 Requires: python%{python3_pkgversion}-ceph-common = %{_epoch_prefix}%{version}-%{release}
 %description volume
 This package contains a tool to deploy OSD with different devices like

debian/control

@@ -456,7 +456,6 @@ Depends: ceph-osd (= ${binary:Version}),
          e2fsprogs,
          lvm2,
          parted,
-         python3-packaging,
          xfsprogs,
          ${misc:Depends},
          ${python3:Depends}

src/ceph-volume/setup.py

@@ -14,7 +14,10 @@
     keywords='ceph volume disk devices lvm',
     url="https://github.com/ceph/ceph",
     zip_safe = False,
-    install_requires='ceph',
+    install_requires=[
+        'ceph',
+        'packaging',
+    ],
     dependency_links=[''.join(['file://', os.path.join(os.getcwd(), '../',
                                                        'python-common#egg=ceph-1.0.0')])],
     tests_require=[