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Description of problem:

Bug 737173 - yum doesn't merge updateinfo from multiple repositories
implemeted merging updateinfo from multiple repos.

It also warns the user if there is a mismatch in various updateinfo data but doesn't warn the user in case there is a mismatch in severity.

Severity has been added to updateinfo in bug 624079

Version-Release number of selected component (if applicable):
yum-3.2.29-40.el6.noarch

How reproducible:
always

Steps to Reproduce:
for details see
https://bugzilla.redhat.com/show_bug.cgi?id=737173
especially #c18
  
Actual results:
no warning in case severity differs

Expected results:
warning

This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unable to address this
request at this time.

Red Hat invites you to ask your support representative to
propose this request, if appropriate, in the next release of
Red Hat Enterprise Linux.

Upstream patch can be applied cleanly - http://yum.baseurl.org/gitweb?p=yum.git;a=commitdiff;h=b52cecf339bd1731bcbfcc3243ba4f39242bb854

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-1384.html