JsonRest.js and unintended globals

[dylan]

i is undefined for this block (around line 96):

args.headers['Transaction'] = actions.length - 1 == i ? "commit" : "open";

i is an unintended global for this block (around line 105):

for(i =0; i < actions.length;i++){ // iterate through the actions to execute

kwArgs is undefined for this block (around line 170):

if(!(service && (object || old) && 
(object || old).__id.indexOf(kwArgs.service.servicePath))){

[Kris Zyp]

(In [16971]) Fixes #8833, correcting some bad global references