Merge branch '2.8.x' into exportAcl

behat.yml

cron/centreon-backup-mysql.sh

doc/en/release_notes/centreon-2.8/centreon-2.8.12.rst

doc/en/release_notes/centreon-2.8/index.rst

doc/fr/release_notes/centreon-2.8/centreon-2.8.12.rst

doc/fr/release_notes/centreon-2.8/index.rst

features/ConnectorConfiguration.feature

features/FirstNotificationDelay.feature

features/HostGroupDependencyConfiguration.feature

features/MetaServiceDependencyConfiguration.feature

features/ServiceDependencyConfiguration.feature

features/ServiceGroupDependencyConfiguration.feature

features/VendorConfiguration.feature

features/bootstrap/ConnectorConfigurationContext.php

features/bootstrap/FirstNotificationDelayContext.php

...res/bootstrap/HostGroupDependencyConfigurationContext.php

features/bootstrap/MassiveChangeServicesContext.php

...s/bootstrap/MetaServiceDependencyConfigurationContext.php

features/bootstrap/ServiceDependencyConfigurationContext.php

features/bootstrap/ServiceGroupConfigurationContext.php