Description of problem:
I am seeing python tracebacks with "dnf repolist" and "dnf repolist -v".

Version-Release number of selected component (if applicable):
dnf-0.4.4-1.fc20.noarch
hawkey-0.4.2-1.git4c51f65.fc20.x86_64
librepo-1.2.1-3.bc2c8a5.fc20.x86_64
rpm-4.11.1-7.fc20.x86_64

How reproducible:
always

Steps to Reproduce:

$ sudo dnf repolist
Traceback (most recent call last):
  File "/bin/dnf", line 35, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 272, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 64, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 133, in _main
    result, resultmsgs = cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1305, in run
    return self.command.doCommand(self.base.basecmd, self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf/cli/commands.py", line 1474, in doCommand
    mdts = repo.metalink_data.repomd.timestamp
AttributeError: 'Repo' object has no attribute 'metalink_data'

$ sudo dnf repolist -v
Config time: 0.007
dnf version: 0.4.4
repo: using cache for: updates-testing
repo: using cache for: fedora
repo: using cache for: rpmfusion-free-rawhide
not found deltainfo for: RPM Fusion for Fedora Rawhide - Free
repo: using cache for: rhpkg
not found deltainfo for: rhpkg for Fedora 20
repo: using cache for: rpmfusion-nonfree-rawhide
not found deltainfo for: RPM Fusion for Fedora Rawhide - Nonfree
repo: using cache for: updates
hawkey sack setup time: 0.193
Traceback (most recent call last):
  File "/bin/dnf", line 35, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 272, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 64, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 133, in _main
    result, resultmsgs = cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1305, in run
    return self.command.doCommand(self.base.basecmd, self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf/cli/commands.py", line 1514, in doCommand
    ts = repo.metalink_data.repomd.timestamp
AttributeError: 'Repo' object has no attribute 'metalink_data'