Escape resource ID in API request path

It looks like client.DoAndGetResponseBody is not working as expected
when id param contains `/`.

Example:
* Method: GET
* URI: platform/15/protocols/nfs/aliases
* ID: /example-nfs-alias

* Expected: Request sent against `/platform/15/protocols/nfs/aliases/%2Fexample-nfs-alias`
* Actual: Request sent against `/platform/15/protocols/nfs/aliases//example-nfs-alias`

api/api.go

@@ -450,7 +450,7 @@ func (c *client) DoAndGetResponseBody(
 	}
 
 	if lid > 0 {
-		ubf.WriteString(id)
+		ubf.WriteString(url.PathEscape(id))
 	}
 
 	// add parameters to the URI