Fixes to the -simple and -flow archetypes

Fixes to the -simple and -flow archetypes
 + Add ${artifactId} at a couple of places in the simple archetype js
   which would take care of someone choosing a name other than simple
 + Adding Rest-Resource-Name for flow archetype
 + Removing 'phoenix' keyword where not required in the flow archetype

Change-Id: I6fdb4901a174181188a1ccb62577d12e9dd6d5e9
Signed-off-by: Anirudh Ramachandran <anirudhvr@gmail.com>