[OpenSIPS-Devel] [OpenSIPS/opensips] b4fce7: Fix db backend init for trace_id's

[Bogdan Andrei IANCU]

  Branch: refs/heads/master
  Home:   https://github.com/OpenSIPS/opensips
  Commit: b4fce7b66d8478c6b3dc5684f2533140b88dc078
      https://github.com/OpenSIPS/opensips/commit/b4fce7b66d8478c6b3dc5684f2533140b88dc078
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2020-01-27 (Mon, 27 Jan 2020)

  Changed paths:
    M modules/tracer/tracer.c

  Log Message:
  -----------
  Fix db backend init for trace_id's

Do not perform DB queries during cfg parsing, but only at mod_init stage, as some DB backends (like db_text) may not be initialized before mod_init.

Closes #1947