Add a gradle task to scaffold new feature services

[mitchshepherd]

Something like newService with the following parameters:

name - The service name
configName (optional) - [string] A top-level configuration name that services can be grouped under. If not specified the service name will be used for the config name.
searchApi (optional) - [true|false] Whether or not the service should have a configuration to support the MarkLogic search API. This is used primarily by the ArcGIS Pro add-in. Defaults to false.
Note

Service name must be a string that is a valid part of a URL path. There should be more checks to make sure this is the case but there are not right now.

Copied issue from koop-provider-marklogic by jkerr5 commented on Jul 18, 2018