Add track by $index to ajsRecursiveDirectiveHelper ng-repeat

[dpopescu]

If you try to render an array of objects, every object will have a new property called $$hashKey. This can be resolved by adding track by $index to ajsRecursiveDirectiveHelper's template in the ng-repeat

Old value: (subkey,subval) in value
New Value: (subkey,subval) in value track by $index