[#359] Override represantation method for Host

Signed-off-by: Ilyas Niyazov <i.niyazov@yadro.com>

src/frostfs_testlib/hosting/interfaces.py

@@ -29,6 +29,9 @@ class Host(ABC):
         self._service_config_by_name = {service_config.name: service_config for service_config in config.services}
         self._cli_config_by_name = {cli_config.name: cli_config for cli_config in config.clis}
 
+    def __repr__(self) -> str:
+        return self.config.address
+
     @property
     def config(self) -> HostConfig:
         """Returns config of the host.