1153378 - remove SSLInsecureRenegotation from pulp_rpm.conf

This setting was enabled for older clients but is no longer needed. Clients
updated after 2010 should not need this flag.

Further documentation on this issue is in the BZ.
Merge pull request #587 from beav/no-insecure-renegotiation

1153378 - remove SSLInsecureRenegotation from pulp_rpm.conf