Enable fully mcritic testing

[jbalsas]

We are currently ignoring a lot of packages from soy linting because it gives us problems. We need to enable it again or we risk introducing bugs and inconsistencies.

[carloslancha]

For this we need to provide mcritic the ability to recognize correctly the modules imports.

[jbalsas]

This is already implemented in mcritic, and we're using it here

The problem is that we have 2 import flavours:

• import 'clay-icon';
• import './ClayFooBase'

The same re-write won't work for the second import, so we need to add the option of multiple import rewrites :(

[carloslancha]

In fact we have 3 import flavours:

• import 'clay-icon';
• import './ClayFooBase'
• import {ClayActionsDropdown} from 'clay-dropdown'

So we need to take in account also the named exports. I've send a pr to fix both problems: deprecate/metal-soy-critic#14