This is a small patch for
https://fedorahosted.org/pki/ticket/822 rhcs81 caManualRenewal with
original profile modified for empty params.name creates root CA subject DN
I am actually not able to reproduce the reported issue on either latest
Dogtag or RHCS8.1, possibly due to some other fix on
SubjectNameDefault. However, the investigation showed that a cert's
subjectName has always been initialized to the issuerName. To avoid
future possible errors in newer profile plugins, I am changing the
initialization to "CN=null".
thanks,
Christina