[sr-dev] [kamailio/kamailio] KEMI Python exists when importing requests (#1130)

Using the Python library "requests" to make API calls via

`import requests`

Makes all the worker processes quit:

``` 0(2667) INFO: <core> [core/kemi.c:86]: sr_kemi_core_info(): [19:19:15.919278] ===== kamailio.child_init(0) 0(2667) INFO: <core> [main.c:759]: handle_sigs(): terminating due to SIGCHLD 1(2672) INFO: <core> [main.c:814]: sig_usr(): signal 15 received ```

Requests is a very common Python HTTP library.

Can be installed via (Debian): apt-get install python-pip pip install requests