Description of problem:
In smart class Parameters, The array elements of key type array should be validated with Validator Type 'list'.
As of now the array key type is not validated with validator type 'list'.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Override the default value of smart class parameter.
2. Select Key type array.
3. Provide the array of elements as new Default Value.
4. Select validator type as list.
5. Validator rule should have each element in array of step 3.

Expected Results:
On Submit, the change is successfully accepted as all the elements in array are present in validator rules list.
If at least one element of array is not present in validator rules list, then It shouldn't allow to accept this change and should display the as 'element in not one of list'.