Add `verify-dockerized` to Makefile
Add `verify-dockerized` to Makefile

The `Makefile` has `generate-dockerized` and `test-dockerized`. For
consistency, and also because its helpful for those who may not have
their Go environment properly setup, add `verify-dockerized` to the
Dockerfile. Its responsible for running `verify` in the docker
container.

pwittrock/community,kubernetes/community,bgrant0607/community,kubernetes/community,pwittrock/community,kubernetes/community,bgrant0607/community