FLUID-5338: wrapped instantiator in ready function

Wrapped the call to fluid.fetchResources in a $(document).ready function to prevent the overviewPanel from instantiating before its container has been loaded into the DOM.
Merge remote-tracking branch 'justin/FLUID-5338'

* justin/FLUID-5338:
  FLUID-5338: wrapped instantiator in ready function
Merge branch 'master' into FLUID-4036