Add pki_share_dbuser_dn for CA
In the future the default value for pki_share_dbuser_dn might
change. To ensure that CA and KRA in IPA will use the same
database user, the pki_share_dbuser_dn needs to be defined
for CA to match the same param for KRA.
Signed-off-by: Endi Sukma Dewata <edewata@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>