Publish username and password to SlapOS master.

software/osie-coupler/buildout.hash.cfg

 [instance-profile]
 filename = instance.cfg.in
-md5sum = cf6c11bc335c75139695008128f1565a
+md5sum = 9ca5ddf6bed34861a17e3352dacc4813

software/osie-coupler/instance.cfg.in

@@ -55,3 +55,5 @@ service = ${:etc}/service
 [publish-connection-parameter]
 recipe = slapos.cookbook:publish
 url-ipv6 = opc.tcp://[${instance-parameter:ipv6-random}]:${instance-parameter:configuration.opc_ua_port}
+username = ${instance-parameter:configuration.username}
+password = ${instance-parameter:configuration.password}