Electrical Properties - Additional attributes

Add the following attributes to the Electrical Properties content schema at the same level as SampleID:

	"Temperature": {
		"type": "object",
		"properties": {
			"Value": {
				"type": "number"
			},
			"UnitOfMeasure": {
				"type": "string",
				"pattern": "^[\\w\\-\\.]+:reference-data\\-\\-UnitOfMeasure:[\\w\\-\\.\\:\\%]+:[0-9]*$"
			}
		},
	"NetConfiningStress": {
		"type": "object",
		"properties": {
			"Value": {
				"type": "number"
			},
			"UnitOfMeasure": {
				"type": "string",
				"pattern": "^[\\w\\-\\.]+:reference-data\\-\\-UnitOfMeasure:[\\w\\-\\.\\:\\%]+:[0-9]*$"
			}
		},
	"Frequency": {
		"type": "object",
		"properties": {
			"Value": {
				"type": "number"
			},
			"UnitOfMeasure": {
				"type": "string",
				"pattern": "^[\\w\\-\\.]+:reference-data\\-\\-UnitOfMeasure:[\\w\\-\\.\\:\\%]+:[0-9]*$"
			}
		}