Also make sure all exceptions are captured when creating CIFS service
record. The one we care about is duplicate entry and we do nothing
in that case anyway.
Also make uniform use of action descriptors.
Samba just needs the cifs/ key on the ipa server. Configure samba to use a
different keytab file so that we do not risk samba commands (net, or similar)
to mess up the system keytab.
https://fedorahosted.org/freeipa/ticket/2168
change default_logger_level to debug in configure_standard_logging
add new ipa_log_manager module, move log_mgr there, also export
root_logger from log_mgr.
change all log_manager imports to ipa_log_manager and change
log_manager.root_logger to root_logger.
add missing import for parse_log_level()
