Increase persistent command_timeout default value (#51056)

* Increase persistent command_timeout default value

*  Increase command_timeout default value from 10 to 30 sec
   to reduce frequent timeout issue for network connection
   types (netconf/network_cli/httpapi/napalm)

* Fix review comments

lib/ansible/plugins/connection/httpapi.py

@@ -137,7 +137,7 @@ options:
         return from the remote device.  If this timer is exceeded before the
         command returns, the connection plugin will raise an exception and
         close.
-    default: 10
+    default: 30
     ini:
       - section: persistent_connection
         key: command_timeout

lib/ansible/plugins/connection/napalm.py

@@ -121,7 +121,7 @@ options:
         return from the remote device.  If this timer is exceeded before the
         command returns, the connection plugin will raise an exception and
         close.
-    default: 10
+    default: 30
     ini:
       - section: persistent_connection
         key: command_timeout

lib/ansible/plugins/connection/netconf.py

@@ -149,7 +149,7 @@ options:
         return from the remote device.  If this timer is exceeded before the
         command returns, the connection plugin will raise an exception and
         close.
-    default: 10
+    default: 30
     ini:
       - section: persistent_connection
         key: command_timeout

lib/ansible/plugins/connection/network_cli.py

@@ -151,7 +151,7 @@ options:
         return from the remote device.  If this timer is exceeded before the
         command returns, the connection plugin will raise an exception and
         close.
-    default: 10
+    default: 30
     ini:
       - section: persistent_connection
         key: command_timeout