[sr-dev] [kamailio/kamailio] Kamailio sending CCR TERMINATE request without waiting for the CCR INITIAL request response (#2143)

**Description**

We are using ims_charging module and Freediameter as diameter server for billing process....recently we faced one issue...For Initial **INVITEs** kamailio sending **CCR request (INITIAL_REQUEST)** to **diameter server** but if we receive Immediate **CANCLE** for the **INVITE**, kamailio sending **CCR request ( TERMINATE_REQUEST )** without waiting for the **CCR request (INITIAL_REQUEST) response** from the **Diameter server.**..

**Expected behavior** Kamailio has to send **CCR request ( TERMINATE_REQUEST )** after getting the **response** from the **INITIAL_REQUEST.**

**Additional Info** kamailio server : 4.2 platform : linux