Ensure that Mocks Use Package Selectors

[Samuel Nelson]

If a mock is in a different package than the package containing the interface, some types may need the package name added as a prefix. E.g.

package bacon

type Bar int

type Foo interface {
  Foo() Bar
}

In the above, I'm pretty sure that we need some additional logic to change Foo() Bar to Foo() bacon.Bar if the generated mock is in the bacon_test package.

[Samuel Nelson]

Update: Yup, this is definitely an issue. It does not automatically handle that.