Remove legacy Lua invocation, Allow impersonate=

* No longer pass initial parameters to Lua module
* Will allow admin to see what a user would see
* Only affects lua functions, not the core
* isSiteAdmin() will return false

Change-Id: Id2251f8828f8b3ac0980c96019206b3437f2883c
Merge "Remove legacy Lua invocation, Allow impersonate="