[app_ext] [auto-ts] Add available_mem_threshold option (sonic-net#2423)

- What I did
With this change, when a new app-extension is installed, available_mem_threshold config is added to AUTO_TECHSUPPORT_FEATURE|<feature_name> key

- How I did it

- How to verify it
vkarri@d7a060369aba:/sonic/src/sonic-utilities$ pytest-3 tests/sonic_package_manager/test_service_creator.py 
=============================================================== test session starts ===============================================================
platform linux -- Python 3.9.2, pytest-6.0.2, py-1.10.0, pluggy-0.13.0
rootdir: /sonic/src/sonic-utilities/tests, configfile: pytest.ini
plugins: pyfakefs-4.7.0, cov-2.10.1
collected 13 items                                                                                                                                

tests/sonic_package_manager/test_service_creator.py .............                                                                           [100%]

=============================================================== 13 passed in 0.25s ================================================================

Signed-off-by: Vivek Reddy Karri <[email protected]>

Author: vivekrnv

sonic_package_manager/service_creator/feature.py

@@ -19,10 +19,10 @@
 AUTO_TS_GLOBAL = "AUTO_TECHSUPPORT"
 AUTO_TS_FEATURE = "AUTO_TECHSUPPORT_FEATURE"
 CFG_STATE = "state"
-# TODO: Enable available_mem_threshold once the mem_leak_auto_ts feature is available
 DEFAULT_AUTO_TS_FEATURE_CONFIG = {
     'state': 'disabled',
-    'rate_limit_interval': '600'
+    'rate_limit_interval': '600',
+    'available_mem_threshold': '10.0'
 }
 
 def is_enabled(cfg):

tests/sonic_package_manager/test_service_creator.py

@@ -313,7 +313,7 @@ def get_entry(cls, table, key):
     @classmethod
     def get_entry_running_cfg(cls, table, key):
         if table == "AUTO_TECHSUPPORT_FEATURE" and key == "test":
-            return {"state" : "disabled", "rate_limit_interval" : "1000"}
+            return {"state" : "disabled", "rate_limit_interval" : "1000", "available_mem_threshold": "20.0"}
         else:
             return {}
 
@@ -328,7 +328,8 @@ def test_auto_ts_global_disabled(mock_sonic_db, manifest):
     feature_registry.register(manifest)
     mock_init_cfg.set_entry.assert_any_call("AUTO_TECHSUPPORT_FEATURE", "test", {
             "state" : "disabled",
-            "rate_limit_interval" : "600"
+            "rate_limit_interval" : "600",
+            "available_mem_threshold": "10.0"
         }
     )
 
@@ -343,7 +344,8 @@ def test_auto_ts_global_enabled(mock_sonic_db, manifest):
     feature_registry.register(manifest)
     mock_init_cfg.set_entry.assert_any_call("AUTO_TECHSUPPORT_FEATURE", "test", {
             "state" : "enabled",
-            "rate_limit_interval" : "600"
+            "rate_limit_interval" : "600",
+            "available_mem_threshold": "10.0"
         }
     )
 
@@ -382,7 +384,8 @@ def test_auto_ts_feature_update_flow(mock_sonic_db, manifest):
             call("AUTO_TECHSUPPORT_FEATURE", "test", None),
             call("AUTO_TECHSUPPORT_FEATURE", "test_new", {
                     "state" : "enabled",
-                    "rate_limit_interval" : "600"
+                    "rate_limit_interval" : "600",
+                    "available_mem_threshold": "10.0"
                 })
         ],
         any_order = True
@@ -393,7 +396,8 @@ def test_auto_ts_feature_update_flow(mock_sonic_db, manifest):
             call("AUTO_TECHSUPPORT_FEATURE", "test", None),
             call("AUTO_TECHSUPPORT_FEATURE", "test_new", {
                     "state" : "disabled",
-                    "rate_limit_interval" : "1000"
+                    "rate_limit_interval" : "1000",
+                    "available_mem_threshold": "20.0"
                 })
         ],
         any_order = True