[Limits] Add metadata to SWGs

Add telemetry metadata to Sine Wave Generators to support
utilizing telemetry in a 'datum' format, to match designed
API for WTD-1223.

example/generator/bundle.json

@@ -29,7 +29,23 @@
                     }
                 },
                 "telemetry": {
-                    "source": "generator"
+                    "source": "generator",
+                    "domains": [
+                        {
+                            "key": "time",
+                            "name": "Time"
+                        }
+                    ],
+                    "ranges": [
+                        {
+                            "key": "sin",
+                            "name": "Sine"
+                        },
+                        {
+                            "key": "cos",
+                            "name": "Cosine"
+                        }
+                    ]
                 },
                 "properties": [
                     {

example/generator/src/SinewaveLimitCapability.js

@@ -61,6 +61,7 @@ define(
                     return LIMITS;
                 },
                 evaluate: function (datum, range) {
+                    range = range || 'sin';
                     if (datum[range] > RED) {
                         return LIMITS.rh;
                     }