read measures in application/soap+xml content-type

[AlvaroVega]

Issue: #759
solution adopted: Parse the XML into a JSON as the value of the measure (then rely un JEXL for further parsing)

For example:

curl -i -X POST 'http://localhost:7897/iot/json/attrs/data?i=disp4&k=izc9cokegoy7kyfgdd6etipt6' -d '<soap:Envelope
	xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
	<soapenv:Header
		xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope"/>
		<soapenv:Body
			xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">
			<ns21:notificationEventRequest
				xmlns:ns21="http://myurl.com">
				<ns21:Param1>ABC12345</ns21:Param1>
				<ns21:Param2/>
				<ns21:Date>28/09/2023 11:48:15 +0000</ns21:Date>
				<ns21:NestedAttr>
					<ns21:SubAttr>This is a description</ns21:SubAttr>
				</ns21:NestedAttr>
				<ns21:Status>Assigned</ns21:Status>
				<ns21:OriginSystem/>
			</ns21:notificationEventRequest>
		</soapenv:Body>
	</soap:Envelope>' -H 'content-type: application/soap+xml'

Produces:

rom=n/a | srv=smartcity | subsrv=/ | msg=Options: {
    "url": "http://iot-orion:1026/v2/entities?options=upsert",
    "method": "POST",
    "headers": {
        "fiware-service": "smartcity",
        "fiware-servicepath": "/"
    },
    "json": {
        "id": "thing:disp4",
        "type": "thing",
        "data": {
            "type": "None",
            "value": {
                "Envelope": {
                    "$": {
                        "xmlns:soap": "http://www.w3.org/2003/05/soap-envelope"
                    },
                    "Header": [
                        {
                            "$": {
                                "xmlns:soapenv": "http://www.w3.org/2003/05/soap-envelope"
                            }
                        }
                    ],
                    "Body": [
                        {
                            "$": {
                                "xmlns:soapenv": "http://www.w3.org/2003/05/soap-envelope"
                            },
                            "notificationEventRequest": [
                                {
                                    "$": {
                                        "xmlns:ns21": "http://myurl.com"
                                    },
                                    "Param1": [
                                        "ABC12345"
                                    ],
                                    "Param2": [
                                        ""
                                    ],
                                    "Date": [
                                        "28/09/2023 11:48:15 +0000"
                                    ],
                                    "NestedAttr": [
                                        {
                                            "SubAttr": [
                                                "This is a description"
                                            ]
                                        }
                                    ],
                                    "Status": [
                                        "Assigned"
                                    ],
                                    "OriginSystem": [
                                        ""
                                    ]
                                }
                            ]
                        }
                    ]
                }
            }
        }
    }
} | comp=IoTAgent

[fgalan]

Maybe this could be included in an specific subsection?

[fgalan]

(Useful if we need to provide support to send the link to the exact subsection)

[fgalan]

LGTM

[rg2011]

LGTM

[mapedraza]

LGTM