feed creation should fully resolve the namespace before calling the provider action

[rabbah]

when a trigger is created from a feed, the CLI does not fully resolve the trigger name and instead uses /_ as in:

{
  "authKey":"...",
  "lifecycleEvent":"CREATE",
   "triggerName":"/_/t"
}

The namespace should be resolved - this can be done on the client by looking up the namespace eg equivalent of wsk namespace list.

The provider can also resolve the namespace by doing the namespace lookup as well. Today, it seems this is being done in some providers by picking up the activation's __OW_NAMESPACE property from the activation context.