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Description of problem:
registration failure message due an empty/corrupt cert in /etc/rhsm/ca folder is not appropriate

Version-Release number of selected component (if applicable):
[root@dhcp35-101 ~]# subscription-manager version
server type: This system is currently not registered.
subscription management server: Unknown
subscription management rules: Unknown
subscription-manager: 1.19.1-1.git.830.8f73a6c.el7
python-rhsm: 1.19.1-1.git.5745.8f73a6c.el7


How reproducible:


Steps to Reproduce:
Create an empty cert:
[root@dhcp35-101 ~]# touch /etc/rhsm/ca/myemptycert.pem

Now try to register:
[root@dhcp35-101 ~]# subscription-manager register --force
Registering to: Shwetha-Candlepin.usersys.redhat.com:8443/candlepin
Username: admin
Password: 
Unable to verify server's identity: unknown error (_ssl.c:2747)


Actual results:


Expected results:


Additional info:

Shwetha, can you remind us what the old behavior was and how this has changed?

Barnaby,
            
       Previously displayed message was "Bad CA certificate: <file path>"

[root@cisco-b200m1-03 ~]# touch /etc/rhsm/ca/myemptycert.pem
[root@cisco-b200m1-03 ~]# subscription-manager register --force
Bad CA certificate: /etc/rhsm/ca/myemptycert.pem


[root@cisco-b200m1-03 ~]# subscription-manager version
server type: Red Hat Subscription Management
subscription management server: 0.9.51.21-1
subscription management rules: 5.15.1
subscription-manager: 1.19.8-1.el7
python-rhsm: 1.19.5-1.el7

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://access.redhat.com/errata/RHBA-2017:2083