Replace all ldap.initialize() calls with a helper function
ldap_initialize(). It handles cacert and cert validation correctly. It
also provides a unique place to handle python-ldap 3.0 bytes warnings in
the future.
Fixes: https://pagure.io/freeipa/issue/7411
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
basedn in custodia related modules has type bytes, that causes issues in
Py3 when strings were concatenated with bytes
```
malformed RDN string = "cn=custodia,cn=ipa,cn=etc,b'dc=example,dc=com'"
```
https://fedorahosted.org/freeipa/ticket/4985
Reviewed-By: Jan Cholasta <jcholast@redhat.com>
