Description of problem:
matej@wycliff: ~$ sudo yum upgrade
[sudo] password for matej: 
Loaded plugins: auto-update-debuginfo, langpacks, product-id, refresh-packagekit,
              : subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Warning: group core does not exist.
Warning: group gnome-desktop does not exist.
Warning: group multimedia does not exist.
Warning: group input-methods does not exist.
Warning: group guest-desktop-agents does not exist.
Warning: group x11 does not exist.
Warning: group fonts does not exist.
Warning: group print-client does not exist.
Warning: group desktop-debugging does not exist.
Warning: group dial-up does not exist.
Warning: group directory-client does not exist.
Warning: group virtualization-hypervisor does not exist.
Warning: group base does not exist.
Warning: group virtualization-tools does not exist.
Warning: group internet-browser does not exist.
Warning: group virtualization-client does not exist.
Warning: group virtualization-platform does not exist.
Warning: group network-file-system-client does not exist.
Resolving Dependencies
--> Running transaction check
---> Package python-backports-ssl_match_hostname.noarch 0:3.2-0.3.a3.el7 will be updated
---> Package python-backports-ssl_match_hostname.noarch 0:3.4.0.2-1.el7 will be an update
--> Processing Dependency: python-backports for package: python-backports-ssl_match_hostname-3.4.0.2-1.el7.noarch
--> Finished Dependency Resolution
--> Finding unneeded leftover dependencies
Found and removing 0 unneeded dependencies
Error: Package: python-backports-ssl_match_hostname-3.4.0.2-1.el7.noarch (df-ws)
           Requires: python-backports
 You could try using --skip-broken to work around the problem
** Found 2 pre-existing rpmdb problem(s), 'yum check' output follows:
lyx-2.0.6-3.el7.x86_64 has missing requires of /usr/bin/dv2dt
lyx-2.0.6-3.el7.x86_64 has missing requires of tex-simplecv
matej@wycliff: ~$ 


Version-Release number of selected component (if applicable):
upgrading on 2013-12-16 EL-7/Nightly

How reproducible:
100%

Actual results:
see above

Expected results:
all dependencies are resolved