Add applicationProfile and protocolRequest to onlineResource

[jlblcc]

applicationProfile is needed to support GeoPlatform, see https://www.geoplatform.gov/wp-content/uploads/2018/05/NGDA_Metadata_Guidelines_v3.pdf. Suggest adding protocolRequest just in case it's needed in the future. Both are free text.

1. applicationProfile(applicationProfile codelist) : name of an application profile that can be used with the online resource
2. protocolRequest: request used to access the resource depending on the protocol (to be used mainly for POST requests)

            "onlineResource": [
                {
                    "uri": "http://thisisanexample.com",
                    "protocol": "",
                    "name": "",
                    "description": "",
                    "function": "",
                    "applicationProfile": "",
                    "protocolRequest": ""
                }
            ],