[sr-dev] [kamailio/kamailio] ims_qos: use msg_ctx_id_t to detect same msg/transaction processing (#1954)

[Sergey Zyrianov]

- relies on msg id and pid, not only msg id (which is incremeted by
each process and has potential conflicts with failure routing)
- msg id and pid are enough to indentify the transaction thus
dropping checks for the pointers

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#### Description
Changed check to verify if response belongs to the saved request.
You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/1954

-- Commit Summary --

  * ims_qos: use msg_ctx_id_t to detect same msg/transaction processing

-- File Changes --

    M src/modules/ims_qos/ims_qos_mod.c (10)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/1954.patch
https://github.com/kamailio/kamailio/pull/1954.diff

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