[sr-dev] [kamailio/kamailio] sanity: Doesn't sent reply when some checks are failed. (#1543)

### Description

According the documentation the module will send reply if one of the checks is failed. However it doesn't send reply if digest credentials, duplicated To/From tags or authorization header checks are failed. I would like to propose to add a new parameter which will enable or disable auto sending of reply.

#### Reproduction

Send to kamailio request with empty nonce in Authorization header.

### Possible Solutions

Set autodrop to 0 and send the reply from configuration file. But in some cases this reply will be sent twice from module and from config.

### Additional Information

kamailio version 4.4.7 and the latest 5.x