SwaggerDocument should support ref property on inline parameter definitions

[naveedaz]

Swashbuckle should be able to support operations with parameters that are just references instead of fully defined objects.

"paths": {
"/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Web/certificates": {
"get": {
"tags": [
"Certificates"
],
"summary": “”,
"operationId": “”,
"consumes": [],
"produces": [ … ],
"parameters": [
{
"$ref": "#/parameters/subscriptionIdParameter"
}
],
"responses": {… },
"deprecated": false
}
},
},
"definitions": { … },

[domaindrivendev]

Available in v5.2.2