Ansible Galaxy is a repository for sharing roles. You can search for specific roles on Galaxy website. All ansible-otc are to find there and you can also use the CLI:
ansible-galaxy search otc_
To install a specific role you can use:
ansible-galaxy install eumel8.otc_auth
or with the requirements file with Galaxy source:
ansible-galaxy install -r galaxy.yml
or with the requirements file with Git source:
ansible-galaxy install -r ansible-role-requirements.yml
You need to adjust the roles_path in ansible.cfg. The system-white roles_path is /etc/ansible/roles
WIP: This feature is a Proof of Concept