xlate/openconfig: disable cache for openconfig-telemetry

This change disables caching for openconfig-telemetry to avoid a
deadlock with the telemetry server.

src/xlate/openconfig/goldstone/xlate/openconfig/cache_updater.py

@@ -5,7 +5,6 @@
 from .interfaces import InterfacesObjectTree
 from .platform import PlatformObjectTree
 from .terminal_device import TerminalDeviceObjectTree
-from .telemetry import TelemetryObjectTree
 from goldstone.lib.errors import Error as ConnectorError
 from goldstone.lib.connector.sysrepo import Connector
 
@@ -39,7 +38,6 @@ def __init__(
             "openconfig-terminal-device": TerminalDeviceObjectTree(
                 self._operational_modes
             ),
-            "openconfig-telemetry": TelemetryObjectTree(),
         }
         for _, object_tree in self._object_trees.items():
             for data in object_tree.required_data():

src/xlate/openconfig/goldstone/xlate/openconfig/main.py

@@ -62,7 +62,8 @@ async def _main(cache, operational_modes):
         ifserver = InterfaceServer(conn, cache)
         pfserver = PlatformServer(conn, cache, operational_modes)
         tdserver = TerminalDeviceServer(conn, cache, operational_modes)
-        tlserver = TelemetryServer(conn, cache)
+        # NOTE: Disable caching for the openconfig-telemetry to avoid a deadlock with the telemetry server.
+        tlserver = TelemetryServer(conn, None)
         servers = [ifserver, pfserver, tdserver, tlserver]
         if cache is not None:
             cacheupdater = CacheUpdater(cache, operational_modes)