Change drush.aliases execution context from local to DOCKER

This resolves right issues that I've seen happening under
certain circumstances.

See merge request !19

This resolves right issues that I've seen happening under
certain circumstances.

Use docker executor to run health check and sonar

Fix the `.gitlab-ci.yml` to properly run a simple health check, and a [SonarQube](http://sonarqube.org/) static analysis.


The SonarQube instance runs at https://sonarqube.savoirfairelinux.net/. Credentials to login are available in SFLvault (m#2222)

See merge request !18

Feature/file system rights



See merge request !16

Check if env.site_profile is a core profile

I had errors with drush8 when not specifying a profile on site-install

See merge request !14

Add parent directory creation when creating drush aliases' directory

<sites/all/> might not have been created yet (in drush8+d8 for instance)

See merge request !15

<sites/all/> might not have been created yet.

Enable GitLab CI

* Provide a .gitlab-ci.yml

See merge request !11

Revert "Merge branch 'feature/update-doc' into '2.x'"

This reverts merge request !9

See merge request !10

Add fab --list command as health check

Add a basic config file to analyse code with sonar

Lookup http://docs.sonarqube.org/display/SCAN/Analyzing+with+SonarQube+Scanner#AnalyzingwithSonarQubeScanner-Installation in order to install and configure sonar-scanner on your development box.

See merge request !8

This reverts merge request !9

Update README



See merge request !9

Use a env var provided by Fabri instead of interactive_mode

Cause we can not override its value as it's defined in a file

See merge request !7

active_mode, cause we can not override its value as it's defined in a file

Provide languages in a variable in conf file

Plutot que ne proposer que le français comme langue en plus de l'anglais, on ouvre les possibilités en gérant les langues additionnelles via un paramètre : env.site_languages. Tout ça pour builder des plateformes prêtes à accueillir des langues supplémentaires.

Voir l'option **--translations** de la commande make pour les valeurs possibles : https://drushcommands.com/drush-7x/make/make/

See merge request !6

Feature/git dirty repos

Add a git "module" that checks if workspace repositories are clean or not.

If not, asks if user wishes to continue with consequence of potentially loosing local files/commits/modifications.

See merge request !5

to detect local branches ahead of remote branches

Add a <tags> argument to the <test> command

We can now filter which scenarios are run by behat.

See merge request !4

+ propose to push local branches

It was confusing to test on a string but passing a boolean as the default
value.

The drush.make command is the one dangerous method. The test should be
done there and not on all methods calling it.