Downgrade Python to more supported version by PM, bring back my kazoo shutdown implementation which works

Author: AnastaZIuk

docker/compose/Dockerfile

@@ -68,9 +68,9 @@ RUN `
 	choco install -y strawberryperl --version 5.28.2.1
 
 RUN `
-	# Download & install Python 3.11.7
+	# Download & install Python 3.11.6
 	`
-	choco install -y python --version 3.11.7
+	choco install -y python --version 3.11.6
 
 RUN `
 	# Donwload debugpy Python module

docker/scripts/nbl/ci/dev/lib/kazoo.py

@@ -62,16 +62,6 @@ def appendKazooAtomic(self, zNodePath, data):
                 pass
 
 
-def shutdownOs():
-    if os.name == 'nt' or os.name == 'java': # For windows and java (in the rare case of running jython)
-        return os.system('shutdown /s /f 0')
-    elif os.name == 'posix': # For Unix, Linux, Mac
-        return os.system('shutdown -h now')
-    else:
-        print('Unknown operating system') # Docs for os.name listed only the above three cases
-        return 1
-
-
 def healthyCheck(host):
     try:
         with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
@@ -92,8 +82,10 @@ def healthyCheck(host):
         if shutdown:
             print("Requested shutdown...")
 
-            if shutdownOs() != 0:
-                print(f"Could not shutdown container")
+            try:
+                subprocess.run(f"shutdown /s /f", check=True)
+            except subprocess.CalledProcessError as e:
+                print(f"Could not shutdown container because of: {e.stderr}")
 
         return True
     except (socket.error, socket.timeout):
@@ -110,4 +102,4 @@ def healthyCheck(host):
     if healthyCheck(args.host):
         sys.exit(0)  # healthy
     else:
-        sys.exit(1)  # not healthy
+        sys.exit(1)  # not healthy