Update dbus timeout to 10 minutes (#326)

Why I did it
We found that GCU takes about 10 minutes to update ACL rules

How I did it
Update dbus timeout to 10 minutes so that we can use GNMI to update ACL rules.

How to verify it
Run GNMI unit test and end to end test

sonic_service_client/dbus_client.go

@@ -125,7 +125,7 @@ func (c *DbusClient) ApplyPatchYang(patch string) error {
 	busName := c.busNamePrefix + modName
 	busPath := c.busPathPrefix + modName
 	intName := c.intNamePrefix + modName + ".apply_patch_yang"
-	_, err := DbusApi(busName, busPath, intName, 240, patch)
+	_, err := DbusApi(busName, busPath, intName, 600, patch)
 	return err
 }
 
@@ -135,7 +135,7 @@ func (c *DbusClient) ApplyPatchDb(patch string) error {
 	busName := c.busNamePrefix + modName
 	busPath := c.busPathPrefix + modName
 	intName := c.intNamePrefix + modName + ".apply_patch_db"
-	_, err := DbusApi(busName, busPath, intName, 240, patch)
+	_, err := DbusApi(busName, busPath, intName, 600, patch)
 	return err
 }