Use the print function

In Python 3, `print` is no longer a statement. Call it as a function
everywhere, and include the future import to remove the statement
in Python 2 code as well.

Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>

daemons/dnssec/ipa-ods-exporter

@@ -14,6 +14,7 @@ first command line argument.
 
 Purpose of this replacement is to upload keys generated by OpenDNSSEC to LDAP.
 """
+from __future__ import print_function
 
 from binascii import hexlify
 from datetime import datetime
@@ -468,7 +469,7 @@ log.addHandler(systemd.journal.JournalHandler())
 log.setLevel(level=logging.DEBUG)
 
 if len(sys.argv) > 2:
-    print __doc__
+    print(__doc__)
     sys.exit(1)
 # program was likely invoked from console, log to it
 elif len(sys.argv) == 2: