Objects being owned by hivemind role can't be reassigned to postgres, since it prevents execution of successfull setup next time (since already existing objects are owned by sysadm)

--postgres-url option should be passed directly to the docker entrypoint, because it performs its dedicated processing.

docker_entrypoint.sh extended by support of standard `install_app`, `uninstall_app` subcommands. Also added standardized alias `--postgres-url` to specify a database connection.

Supplemented definition of helper script due to changed interface of `hive.wait_for_ready_instance` function.

Issue #200 - run_instance script extended to simplify starting separate containers for hive sync and server processes.

Replaced scripts/ci-helpers/build_and_publish_instance.sh with a symbolic link to haf/hive/scripts/ci-helpers/build_and_publish_instance.sh - ref. hive#434

build.sh script additionally immediately uses atomic package to enforce its final build on builder image. Then runtime image can be smaller due to eliminated compiler.