Remove EWC support & move LDAP/RBAC configuration to Stackstorm.st2

[winem]

This PR:

• removes the EWC roles
• removes EWC/BWS from the README
• updates links to the documentation from ewc-docs to docs.stackstorm.com
• adds the ability to disable RBAC again (this was not possible before because the RBAC playbook was imported only when RBAC should be enabled; so disabling RBAC in the ansible variables did not actually disable it in the st2 deployment

close #260

[arm4b]

+112 −740 - nice diff, love it! Makes things so much easier now 👍

Some early pointers for this PR, - looks also that the RBAC logic is missing notifying the st2-apply-rbac-definitions --config-file /etc/st2/st2.conf to apply the new definitions & assignments.

[arm4b]

Related to this PR, st2docs may need an update: https://docs.stackstorm.com/install/ansible.html to reflect this new change.

It's possible to include the instructions from the history to provide the RBAC & LDAP configuration example:
https://github.com/StackStorm/st2docs/pull/1020/files#diff-3f8f088be48f3933baeab8a1722d69bb0c9f2351670eaf2f2f4a2c9d83058e9c

[winem]

Related to this PR, st2docs may need an update: https://docs.stackstorm.com/install/ansible.html to reflect this new change.

It's possible to include the instructions from the history to provide the RBAC & LDAP configuration example:
https://github.com/StackStorm/st2docs/pull/1020/files#diff-3f8f088be48f3933baeab8a1722d69bb0c9f2351670eaf2f2f4a2c9d83058e9c

I'll look into that over the weekend.

[winem]

I provided a PR for the st2docs update: StackStorm/st2docs#1061

[arm4b]

Thanks for migrating the RBAC smoketests.

All looks good, however based on TravisCI jobs RBAC smoke tests are skipped. Could we enable them to make sure that the added functionality is tested in CI?

[winem]

Enabling the RBAC tests take a bit more time than expected but I'm on it and provide them in the next days.

[arm4b]

Looks like the tests are failing on idempotence checks.

I've provided more pointers around the RBAC some tests, hope that helps.

[winem]

@armab this PR passes the tests now and I ran them multiple times in my own dev environment. So I hope I got everything right now.

[arm4b]

Great work! 👍

Thanks a lot for the diligence refactoring this.