Fix e2e test failures

tests_e2e/test_suites/ext_policy_with_dependencies.yml

@@ -5,4 +5,7 @@ name: "ExtPolicyWithDependencies"
 tests:
   - "ext_policy/ext_policy_with_dependencies.py"
 images: "random(endorsed)"
-executes_on_scale_set: true
+executes_on_scale_set: true
+# This test should run on its own VMSS, because other tests may leave behind extensions
+# that are disallowed by policy and affect results.
+owns_vm: true

tests_e2e/tests/ext_policy/ext_policy_with_dependencies.py

@@ -141,7 +141,7 @@ def run(self):
 
             # Copy policy file to each instance
             log.info("Updating policy file with new policy: {0}".format(policy))
-            for instance_name, ssh_client in ssh_clients.items():
+            for ssh_client in ssh_clients.values():
                 self._create_policy_file(ssh_client, policy)
 
             # Deploy updated extension template to the scale set.

tests_e2e/tests/scripts/agent_ext_workflow-check_data_in_agent_log.py

@@ -36,8 +36,11 @@ def main():
     found = False
 
     try:
-        after_timestamp = (datetime.strptime(args.after_timestamp, '%Y-%m-%d %H:%M:%S') if args.after_timestamp else None)
-        found = AgentLog(Path('/var/log/waagent.log')).agent_log_contains(args.data, after_timestamp)
+        if args.after_timestamp is not None:
+            after_datetime = datetime.strptime(args.after_timestamp, '%Y-%m-%d %H:%M:%S')
+            found = AgentLog(Path('/var/log/waagent.log')).agent_log_contains(args.data, after_datetime)
+        else:
+            found = AgentLog(Path('/var/log/waagent.log')).agent_log_contains(args.data)
         if found:
             print("Found data: {0} in agent log".format(args.data))
         else: