models/interfaces.py: fixing an 'is not defined' error

The method was being called as '_get_all_libvirt_interfaces' instead
of 'self._get_all_libvirt_interfaces'.

Signed-off-by: Daniel Henrique Barboza <[email protected]>

Author: danielhb

models/interfaces.py

@@ -53,7 +53,7 @@ def lookup(self, name):
         return info
 
     def _is_interface_editable(self, iface):
-        return iface in _get_all_libvirt_interfaces()
+        return iface in self._get_all_libvirt_interfaces()
 
     def _get_all_libvirt_interfaces(self):
         conn = LibvirtConnection("qemu:///system").get()