Ajax safe default values

[whizsid]

Currently component will giving an error in console when we set "data-id"="1,4" and ajax will not loaded an object with id 4. This PR will fix it.

Uncaught TypeError: Cannot read property 'id' of undefined

This PR is also filtering the duplicated objects with same ids.

Usage:-

$('#basic').magicsearch({
        // You can use this property with any type. (ajax,multiple...)
         defaultValue:{id: 10, firstName: 'Bruce', lastName: 'Wayne'},
         // Or we can use an array
         defaultValue:[
              {id: 10, firstName: 'Bruce', lastName: 'Wayne'},
              {id: 9, firstName: 'Tony', lastName: 'Well'}
         ],
});

Old attr-id default values method is not overridden.