[sr-dev] [kamailio/kamailio] topos: retry initial INVITE - no Contact (#1356)

[sergey-vb]

### Description

When callee device not reachable kamailio tries to reach it, I have profile with 3 retries with 1second interval.
But Contact header present only in 1-st Invite. Next Invites are send without Contact header...

With topoh module - Contact normal in all INVITES.
### Troubleshooting

#### Reproduction

Load and configure topos module
Create permanent location record which is unreachable.
Make call to it. make sure that you have profile with retries.


#### Log Messages

[kamailio.tar.gz](https://github.com/kamailio/kamailio/files/1542939/kamailio.tar.gz)


#### SIP Traffic

[retry-Invite-on-not-reach.tar.gz](https://github.com/kamailio/kamailio/files/1542940/retry-Invite-on-not-reach.tar.gz)


### Additional Information

  * **Kamailio Version** 
version: kamailio 5.2.0-dev1 (x86_64/linux) 
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown 
compiled on 14:50:56 Dec  8 2017 with gcc 4.8.5

* **Operating System**:
Red Hat Enterprise Linux Server 7.3

3.10.0-514.el7.x86_64 #1 SMP Wed Oct 19 11:24:13 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux


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https://github.com/kamailio/kamailio/issues/1356
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