EoN's should wait until the primary host application is online when configured

[NklsP]

Hi @SeppPenner,

There is an option to be set "PublishKnownDeviceMetricsOnReconnect" when we don't want to send the device metrics on startup but this is only for device metris and there is no such option for node metrics. As per the specification, when a primary host application is configured the node MUST wait until the STATE = True before sending the NBIRTH and DBIRTH.

I've created a pull request: #111

Specification

[tck-id-message-flow-edge-node-birth-publish-phid-wait] If the Edge Node is configured to
wait for a Primary Host Application it MUST verify the Primary Host Application is online via
the STATE topic before publishing NBIRTH and DBIRTH messages.