Put translations into a subpackage shared by Python 2 and 3

With providing both Python 2 and Python 3 packages we need to make sure both
have the translations available. This commit makes the translations shared by
both Python 2 and 3 subpackages by putting them into a separate subpackage
required by both.

python-blivet.spec

@@ -45,11 +45,19 @@ Requires: libblockdev-plugins-all >= %{libblockdevver}
 Requires: libselinux-python
 Requires: python-hawkey
 Requires: pygobject3
+Requires: %{realname}-data-%{version}-%{release}
 
 %description
 The python-blivet package is a python module for examining and modifying
 storage configuration.
 
+%package -n %{realname}-data
+Summary: Data for the %{realname} python module.
+
+%description -n %{realname}-data
+The %{realname}-data package provides data files required by the %{realname}
+python module.
+
 %if 0%{with_python3}
 %package -n python3-%{realname}
 Summary: A python3 package for examining and modifying storage configuration.
@@ -68,6 +76,7 @@ Requires: e2fsprogs >= %{e2fsver}
 Requires: lsof
 Requires: python3-hawkey
 Requires: python3-gobject
+Requires: %{realname}-data-%{version}-%{release}
 
 %description -n python3-%{realname}
 The python3-%{realname} is a python3 package for examining and modifying storage
@@ -102,6 +111,8 @@ popd
 %doc README ChangeLog examples
 %{python_sitelib}/*
 
+%files -n %{realname}-data -f %{realname}.lang
+
 %if 0%{?with_python3}
 %files -n python3-%{realname}
 %license COPYING