Adding minimal meta file for Ansible Galaxy.

[ycombinator]

Should you choose to submit this role to Ansible Galaxy, you will need a meta/main.yml file that describes this role. This PR introduces a minimal meta/main.yml file so that this role may be used as an Ansible Galaxy role.

The information in this minimal meta/main.yml file is based on the README as well as empirical evidence. Feel free to update it as you see fit.

Also included in this PR is a meta/main.yml.sample file that was generated by running ansible-galaxy init. It lists all possible values for various parts of the meta/main.yml file such as platforms, categories, etc. Please use the values in this file to populate the meta/main.yml file.

[Java1Guy]

Please add this pull request! The meta/main.yml file is needed even without submitting to Ansible Galaxy -- if users want to use ansible-galaxy to install directly from GitHub, it is required: {quote} Updating ansible roles specified using ansible-galaxy. ansible-galaxy install --force --role-file .../ansible/roles/roles.yml --roles-path .../ansible/roles

• executing: git clone https://github.com/yaegashi/ansible-role-blockinfile.git blockinfile
• executing: git archive --prefix=blockinfile/ --output=/var/folders/9j/w29ms7g11l10tmtywjcll2h80000gn/T/tmprwcUb3.tar HEAD
• extracting blockinfile to ..../ansible/roles/blockinfile
• blockinfile was installed successfully
• executing: git clone https://github.com/ICTO/ansible-jenkins.git ansible-jenkins
• executing: git archive --prefix=ansible-jenkins/ --output=/var/folders/9j/w29ms7g11l10tmtywjcll2h80000gn/T/tmpNCP3Up.tar HEAD
• error: this role does not appear to have a meta/main.yml file.
• ansible-jenkins was NOT installed successfully.
• you can use --ignore-errors to skip failed roles. {quote}