Update wis2node.adoc focusing on Registration, decomissioning of node…

…s & datasets, node performance metrics (#62)

* Update wis2node.adoc

For Review: Updates to 2.2.1 Practices and Procedures, 2.2.2 Publishing data, metadata, discovery metadata and notification messages, and 2.2.3 Performance metrics.

All sections likely will need formatting reviews.  Some things I noted while working are  when do we use WIS vs WIS2 - specifically about nodes, but I think there are few other places where they are used interchangeably.

For performance metrics, the template asked specifically for WIS nodes and not global services.  We focused more on the performance metrics for global services, I can add these if desired, but I stuck to nodes and drew more on what happens currently for GISCs and GISC watch for what I wrote.

* Update wis2node.adoc

Made edits based on suggestions from Jeremy @6a6d74 on 2 January.

* Update wis2node.adoc

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Co-authored-by: Tom Kralidis <[email protected]>