SIP MESAGE to the outbound proxy which requires authentication

[ThE-MaRaC]

Is this a BUG REPORT or FEATURE REQUEST?:

Uncomment only one, leave it on its own line:

/kind bug

/kind feature

What happened:
Sending SIP MESSAGE to the outbound proxy which requires authentication results in an endless MESSAGE loop.
What you expected to happen:
SIP MESSAGE should be successfully sent. Outbound proxy authentication should also be successful.
How to reproduce it (as minimally and precisely as possible):
Create a client, log in with it in Jitsi and try to send a message to the number which is not present in Restcomm DB.

Anything else we need to know?:

Environment:

• Restcomm Connect version (from startup logs): compiled from master branch (2194dee)
• Cloud provider or hardware configuration: hardware
• OS (e.g. from /etc/os-release): Ubuntu 18.04.4 LTS
• Kernel (e.g. uname -a): 4.4.0 x86_64 GNU/Linux
• Deployment method (e.g. docker-compose, with linked docker-compose.yml file,
  or application server info + deployment option): JBoss AS 7.2.0.Final
• Others:

If you need Jitisi TCP dump or any other info, please let me know