Dependencies installed if collector_is_containerized is defined

[rogercoll]

The meta information of the opentelemetry_collector role should only install the dependencies if collector_is_containerized equals to false. Currently, if the user defines it, whether to true or false it will try to run the dependencies:

dependencies:
  - role: 'geerlingguy.pip'
    when: collector_is_containerized
    vars:
      pip_install_packages:
        - docker
  - { role: 'geerlingguy.docker', when: collector_is_containerized }