Use forward dependency for ca_file instead of reverse one

We can have this failing because of bad mine data:
salt['mine.get'](cert.host, 'x509.get_pem_entries')

Without this change, dependency between salt_minion_cert_*_all and
ca_file is just ignored and salt_minion_cert_*_all state fails because
it can't find appropriate file.

Change-Id: I2a5dd12e08159bf110ff0d9879ebf0ad5d9d97c1
1 file changed