Cert Validation memory leaks

Cert Validation memory leaks

In the case SSL errors detected by certificate validator helper the objects
stored in Ssl::ServerBump::sslErrors  member and will never released.
This member normally points to an Ssl::CertErrors list attached to the related
SSL object which is responsible to release this list.
When the cert validator detects errors a new errors list created and attached
to the related Ssl::ServerBump::sslErrors member but the SSL objects still
hold the old one. The old list released but not the new one.

This patch also fixes the case the cbdata protected  Ssl::CertErrors list,
still is used through the related Ssl::ServerBump object but it is not valid
any more, because the SSL object which hold it gone.

This patch instead of storing the Ssl::CertErrors list to Ssl::ServerBump
object stores the SSL object and increases its reference to avoid be released

This is a Measurement Factory project