Bug fixes

Add SDQS support to handle requests as:

• On Own Name
• Representative Of

Petitioner of type "Representative Of", can handle multiple records of principals

Names of petitioner are handled to split text and fill service's respective fields

Verified compatibility with PHP 7.1.x

fixed issues:
#2931670: replace drupal_set_message() by Messenger service
#2933066: Status of configuration as entity operation

Adding cache tags for the Search API query.

Fixed get image preview.

Fixed the Behat pipeline because the KernelBaseTests wouldn't run.