Bug 1331395

This bug has been created based on an anonymous crash report requested by the package maintainer.

Report URL: http://faf.lab.eng.brq.redhat.com/faf/reports/bthash/b2d302feb13eb7fd27ffebb0313c2b0f3b304f53/

reproducer: 
call('yum -y install usb_modeswitch ModemManager', shell=True)
call('systemctl restart ModemManager.service', shell=True)
call('for i in $(ls /sys/bus/usb/devices/usb*/authorized); do echo 0 > $i; done', shell=True)
call('for i in $(ls /sys/bus/usb/devices/usb*/authorized); do echo 1 > $i; done', shell=True)
sleep(15)
^^ this is very important changing to 20 and everything behave OK.

then test adds new novice mode connection for gsm device
    * Open wizard for adding new connection
    * Expect "Connection type"
    * Submit "gsm" in editor
    * Expect "Interface name"
    * Enter in editor (this means no device specified)
    * Expect "APN"
    * Submit "internet" in editor
    * Expect "Do you want to provide them\? \(yes\/no\) \[yes\]"
    * Submit "no" in editor
    * Expect "Do you want to add IP addresses\? \(yes\/no\) \[yes\]"
    * Submit "no" in editor
## crash is here when NM autoconnects created connection 
    * Bring "up" connection "gsm"
    Then "gsm" is visible with command "nmcli con show -a" in "10" seconds
     And Ping "redhat.com"

[root@wlan-intel-6200 NetworkManager]# rpm -qa NetworkManager*
NetworkManager-adsl-1.2.0-1.el7.x86_64
NetworkManager-libnm-1.2.0-1.el7.x86_64
NetworkManager-wwan-1.2.0-1.el7.x86_64
NetworkManager-bluetooth-1.2.0-1.el7.x86_64
NetworkManager-wifi-1.2.0-1.el7.x86_64
NetworkManager-tui-1.2.0-1.el7.x86_64
NetworkManager-config-server-1.2.0-1.el7.x86_64
NetworkManager-debuginfo-1.2.0-1.el7.x86_64
NetworkManager-1.2.0-1.el7.x86_64
NetworkManager-team-1.2.0-1.el7.x86_64
NetworkManager-glib-1.2.0-1.el7.x86_64
NetworkManager-libreswan-1.0.6-3.el7.x86_64