build-galaxy-release: Galaxyfy READMEs, module EXAMPLES and tests

Up to now the snippets in the README files, the EXAMPLES in the modules
and also the tests playbooks have not been adapted while building the
collection.

These are the invoved python files:

    utils/galaxyfy-README.py
    utils/galaxyfy-module-EXAMPLES.py
    utils/galaxyfy-playbook.py
    utils/galaxyfy.py

utils/galaxyfy.py provides the function galaxyfy_playbook, which has been
extended and is used in galaxyfy-playbook.py, galaxyfy-README.py and
galaxyfy-module-EXAMPLES.py.