[BUG] A carrier that returns a 5xx error will stop dSIP from advancing to another carrier

[mackhendricks]

Describe the bug
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To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Screenshots
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Add any applicable logs as well; such as an dsiprouter.log, or kamailio.log, etc...

Server Info:

• OS: output from uname -a
• Distro: output from cat /etc/os-release
• dSIPRouter Version: output from dsiprouter version
  If not on a release version include the branch name and last commit id
• Kamailio Version: output from kamailio -v
• RTPengine Version: output from rtpengine -v
• Python Package Versions: if applicable, include output from python3 -m pip freeze

Client Info:

• Device: e.g. Polycom VVX 350, Lenovo Thinkpad X1, ..
• OS: e.g. Windows 11, Ubuntu 22.04, ..
• Client Software: e.g. Mozilla Firefox 103.0, Zoiper 5.5.13, ..

Additional context
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[devopsec]

is this occuring when routing via drouting or dispatcher?
the error handling logic is different for each

[devopsec]

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