Fix behat tests initialization



See merge request !38

This helper will try to check file on a remote server. To do this, it needs to
have a configured key to connect via SSH.

This reverts commit 9e2dac93.

Clear cached bytecode file after local_vars.py modification



See merge request !37

Dockerfile initializer in Drupalizer



See merge request !34

When Drupal is build for the second (third, etc.) time, it is necessary to restore write permission on site settings.php file, because it is removed by Drupal by default.

Otherwise Drush make command will fail to copy all files to the src/drupal/.

On a clean project, this directory will not exist when Docker image is build
for the first time. And this will trigger an Apache config checker warning
later in the script. Creating an empty directory will silence the warning in
the build output.

The contents of the Dockerfile are based on the same file in boilerplate
meta-repository that is normally used in combination with Drupalizer.

Update README.adoc



See merge request !36

# Conflicts:
#   README.adoc

Provide a new var, to define site default language



See merge request !35

Execute git while making sure it answers in English

This way, regardless of the default language in the environment,
our task will complete as expected.

See merge request !31

This way, regardless of the default language in the environment,
our task will complete as expected.