Make TestSubscriptionResumptionCapacityStep2 an async test

Eliminate use of ZCLSubscribeAttribute and embrace asyncio.

Author: agners

src/controller/python/test/test_scripts/base.py

@@ -1454,7 +1454,7 @@ async def TestSubscriptionResumptionCapacityStep1(self, nodeid: int, endpoint: i
 
         return True
 
-    def TestSubscriptionResumptionCapacityStep2(self, nodeid: int, endpoint: int, remote_ip: str, ssh_port: int,
+    async def TestSubscriptionResumptionCapacityStep2(self, nodeid: int, endpoint: int, remote_ip: str, ssh_port: int,
                                                 remote_server_app: str, subscription_capacity: int):
         try:
             self.logger.info("Restart remote deivce")
@@ -1469,8 +1469,9 @@ def TestSubscriptionResumptionCapacityStep2(self, nodeid: int, endpoint: int, re
             self.logger.info("Send a new subscription request from the second controller")
             # Close previous session so that the second controller will res-establish the session with the remote device
             self.devCtrl.CloseSession(nodeid)
-            self.devCtrl.ZCLSubscribeAttribute(
-                "BasicInformation", "NodeLabel", nodeid, endpoint, 1, 50, keepSubscriptions=True, autoResubscribe=False)
+            await self.devCtrl.ReadAttribute(nodeid, [(endpoint, Clusters.BasicInformation.Attributes.NodeLabel)], None,
+                False, reportInterval=(1, 50),
+                keepSubscriptions=True, autoResubscribe=False)
 
             if restartRemoteThread.is_alive():
                 # Thread join timed out

src/controller/python/test/test_scripts/subscription_resumption_capacity_test_ctrl2.py

@@ -19,6 +19,7 @@
 
 # Commissioning test.
 
+import asyncio
 import os
 import sys
 from optparse import OptionParser
@@ -125,8 +126,9 @@ def main():
         "Failed on on-network commissioing")
 
     FailIfNot(
-        test.TestSubscriptionResumptionCapacityStep2(options.nodeid, TEST_ENDPOINT_ID, options.deviceAddress,
-                                                     TEST_SSH_PORT, options.remoteServerApp, options.subscriptionCapacity),
+        asyncio.run(
+            test.TestSubscriptionResumptionCapacityStep2(options.nodeid, TEST_ENDPOINT_ID, options.deviceAddress,
+                                                         TEST_SSH_PORT, options.remoteServerApp, options.subscriptionCapacity)),
         "Failed on testing subscription resumption capacity")
 
     timeoutTicker.stop()