Improve how we handle server only properties in Advanced Clustering

[rbeckman-nextgen]

• Server only properties are not retrieved by the Administrator
• Server only properties can be added to the server without having to manually account for them on the client side ensuring they don't get deleted on settings save.

Imported Issue. Original Details: Jira Issue Key: MIRTH-4420 Reporter: narupley Created: 2019-06-04T12:52:55.000-0700