Fix checking result of queryInstalled()

[jimthematrix]

the label property has the value that is a combination of the chaincode name version. for instance if the chaincode name is basic, and version is v2.0, then the label is returned as basic_v2.0, using the convention _ to concatenate the two parts:

{
	"installed_chaincodes": [
		{
			"package_id": "firefly_1.0:b8e754685421dd03e40251b9ef2dd811e49659453cd489ca7bd27585d9be06b4",
			"label": "firefly_1.0",
			"references": {
				"firefly": {
					"chaincodes": [
						{
							"name": "firefly",
							"version": "1.0"
						}
					]
				}
			}
		},
		{
			"package_id": "basic_v1.0:351b39eb21c6a1d42f65d21398bf747880404c322a8883f2fb61fe1a3bb0d68d",
			"label": "basic_v1.0"
		}
	]
}

[nguyer]

Thanks for finding and fixing this, @jimthematrix!