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Description of problem:
Occasionally subscription-manager commands hang, and the only way to enable a successful run of subscription-manager is to restart the rhsmcertd

Version-Release number of selected component (if applicable):
subscription-manager-1.15.9-15.el7.x86_64

How reproducible:
~50%

Steps to Reproduce:
In my instance, the following steps caused the issue. 
1. install satellite 6's consumer RPM
2. run subscription-manager register. 
3.

Actual results:

the 'subscription-manager register' command hangs. 


Expected results:

subscription-manager commands complete without hanging. 

Additional info:

There are other, non Satellite 6 related instances where this happens, as shown below:

https://access.redhat.com/solutions/2202931
https://access.redhat.com/solutions/2110281
https://access.redhat.com/solutions/1754373
https://access.redhat.com/solutions/1342823

This leads me to believe the issue is not Satellite 6 specific.

I've also hit this a couple of times when subscribing RHEL6 (6.3-6.5, with rhsm/sub-man bits from 6.7) guests to Satellite 6.1.

The PR below should fix this issue, in short, by providing a default timeout to all SSL connections.

PR: https://github.com/candlepin/python-rhsm/pull/170

Hopefully the addition of a socket timeout (3 minutes by default, but configurable via the server_timeout variable) will address this issue, but it's difficult to say given the lack of specifics in the bug report.

*** This bug has been marked as a duplicate of bug 1346417 ***