Building yum with startswith-error.patch

When rebuilding Mirror (on srv 11):

Adding Package sysvinit-tools-2.87-5.dsf.el6.x86_64 in mode u
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 315, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 263, in main
    return_code = base.doTransaction()
  File "/usr/share/yum-cli/cli.py", line 423, in doTransaction
    if msg.startswith('rpmlib('):
AttributeError: 'rpm.prob' object has no attribute 'startswith'

http://jenkins-product.srt.mirantis.net:8080/job/fuel_5_0_mirror/36/console

Patch: https://launchpadlibrarian.net/130540370/startswith-error.patch
Bug: https://bugs.launchpad.net/ubuntu/+source/yum/+bug/1117465