commands/operator-sdk,pkg/generator: Fix project root function and rbac updates for Ansible Operator

[dymurray]

This fixes a regression introduced in: #561

To determine if we are in the project root I've changed it to look for tmp/build/Dockerfile.

I also changed the rbac files to have Jinja templating for required differences in Ansible Operator RBAC. It sounds like the Jinja can go away when master is rebased on controller-runtime but I could be wrong on that.

[openshift-ci-robot]

Hi @dymurray. Thanks for your PR.

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[shawn-hurley]

We need this to fix a bug that was introduced with changes to the build command.

@hasbro17 @AlexNPavel PTAL

[AlexNPavel]

LGTM. We'll probably need to look at the controller-runtime refactor branch as well. That checks for the existence of ./cmd/manager/main.go (and the location of the dockerfiles changed)

[hasbro17]

Yeah for now let's just make sure the Ansible CLI works on the master branch. Moving the type ansible CLI changes over to the refactor branch shouldn't be too hard.
LGTM.