ModelConverter should support collections.

[chernecov]

In some cases we need to send collection of objects as action parameter.
For example - client wants to get information about 1000 entities.

[
    {"id": 1},
    {"id": 2},
    ...
]

Model converter should be able to handle that request.
As class parameter we should be able to pass this: MyCollectionClass
In that case I can get validatable collection of validatable parameter objects right in given action.