fix generated import types in controller, by using full repo

[dukanto]

Description of your changes

Pass down full repo name to controller template, so imports are correctly generated.

Fixes #66

I have:

• [x] Read and followed Crossplane's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [ ] Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

By running provider.addtype target with a repo that is not github.com/crossplane/* i.e. github.com/myorg/* Once run, go to generated controller and check that imports have the correct format.

    "github.com/myorg/provider-test/apis/GROUP/v1alpha1"
    apisv1alpha1 "github.com/myorg/provider-test/apis/v1alpha1"