Need configurable logging from subscriber_command

[jfinzel]

Logging is noisy and should be more configurable. Temporary workaround:

ALTER FUNCTION pgl_ddl_deploy.subscriber_command(name,text[],name,name,text,text,integer,integer,boolean,pgl_ddl_deploy.signals,integer,pgl_ddl_deploy.driver,boolean)
SET log_min_messages TO fatal
SET log_min_error_statement TO warning;