GEMS17 — Update GEMS PIM to add Delete Configuration message

The GEMS PIM currently supports a "Save Configuration" message, however does not support a reciprocal "Delete Configuration".
Requesting the addition of a "Delete Configuration" message to the PIM and supporting content in each of the PSMs, i.e. the upcoming GEMS JSON/REST PSM.

Add the following section to the new GEMS JSON/REST PSM as follows:
9.2.17 Delete Configuration
The normative definition for the delete configuration message is defined below. Everything is normative other than the example values. The TARGET is the configuration service for the given GEMS device which must provide the deleteConfiguration directive that implements the following API to comply with this standard.

Delete Configuration in a GEMS device (i.e. deletes the specified configuration file):
HTTP Verb: POST
URI: https://<host>:<port>/gems/<configService>/_directives/deleteConfiguration
Content-Type: application/json
{
"name":

}

JSON Response for Load Configuration:
{
"result":

}

Add a new row to Table 9.2 of the JSON/REST PSM for GEMS Message "Delete Configuration" with HTTP Method/Verb "POST" and a link to the above "Delete Configuration" section 9.2.17.

Add corresponding sections for the XML and ASCII PSMs.