updated swagger with new fields for task spec

Signed-off-by: Evan Hazlett <ejhazlett@gmail.com>

api/swagger.yaml

@@ -2096,6 +2096,12 @@ definitions:
       ForceUpdate:
         description: "A counter that triggers an update even if no relevant parameters have been changed."
         type: "integer"
+      Runtime:
+        description: "Runtime is the type of runtime specified for the task executor."
+        type: "string"
+      RuntimeData:
+        description: "RuntimeData is the payload sent to be used with the runtime for the executor."
+        type: "array"
       Networks:
         type: "array"
         items: