MU: camelCased lookups

[mixonic]

Ensure the module unification resolver handles cases where:

export default Component.extend({
  someSession: inject.service()
});

Ember looks up someSession on the container as camelCase. This means we would require the normalization step for the resolver.

An alternative approach would be to dasherize the property name before calling lookup in Ember.

/cc @tmquinn

[stefanpenner]

@mixonic I think in a perfect world, the service() descriptor would handle that.

[mixonic]

Closed in #206

Doing this in Ember's current service injection system is tricky since the injections are part of metal but dasherize etc are not. I punted and simply implemented in this repo for now.