CI testing should use build_instance.sh and built image during 5M testing

Hivemind image should be prepared by calling build_instance.sh script. 2 Hivemind service instances shall be defined using service constructs:

• one for sync purposes (to perform a sync process using data provided by HAF data container
• one for server purposes (to start API server for final testing).

Above should replace current steps covered by hive_sync.sh and hive_server.sh

If possible some common parts specific to HAF-app testing should be reused.