Flush Python logs to display them in non-interactive sessions (#221)

1.hello-world/app.py

@@ -18,6 +18,6 @@ while True:
     try:
         response = requests.post(dapr_url, json=message, timeout=5)
     except Exception as e:
-        print(e)
+        print(e, flush=True)
 
     time.sleep(1)

2.hello-kubernetes/python/app.py

@@ -18,6 +18,6 @@ while True:
     try:
         response = requests.post(dapr_url, json=message, timeout=5)
     except Exception as e:
-        print(e)
+        print(e, flush=True)
 
     time.sleep(1)

5.bindings/pythonapp/app.py

@@ -20,6 +20,6 @@ while True:
         print(response, flush=True)
 
     except Exception as e:
-        print(e)
+        print(e, flush=True)
 
     time.sleep(1)