### Description

rtpengine_manage doesn't delete session on BYE or CANCEL method.

### Troubleshooting

I tried to use rtpengine_manage which has to delete session when Kamailio got BYE or CANCEL packet. But rtpengine_manage hasn't deleted RTP session after call was ended. Session deleted later on timeout by rtpengine.

I execute "rtpengine_delete" in config by myself but is this a normal conduct for this module?

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

version: kamailio 4.4.5 (x86_64/linux) f98162 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: f98162 compiled on 18:04:29 Feb 13 2017 with gcc 4.7.2

* **Operating System**:

Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1+deb7u1 x86_64 GNU/Linux