Bug 75968

Description of problem:
After letting "Network configuration" window open for some time, python tracebak
appears saying that "Too many open files".

How reproducible:
Always, tested on 2 boxes with different configuration.

Steps to Reproduce:
1. Start Network configuration
2. Wait for some time
3. Traceback window appears saying:

Traceback (most recent calls last)
File "/usr/sbin/neat", line 774, in update_devicelist
File "/usr/sbin/../redhat-config-network/netconfpkg/Config.py", line 64, in __init__
File "/usr/sbin/../redhat-config-network/netconfpkg/Config.py", line 64, in load
OSError: Too many open files

Even the traceback is not possible to save, the only solution is to kill the
python process.

lsof shows 1024 lines of:
neat      1260    root 1019u  sock        0,0             81880 can't identify
protocol
neat      1260    root 1020u  sock        0,0             81881 can't identify
protocol
neat      1260    root 1021u  sock        0,0             82380 can't identify
protocol
neat      1260    root 1022u  sock        0,0             82381 can't identify
protocol
neat      1260    root 1023u  sock        0,0             82392 can't identify
protocol

Process 1260 is:
root      1260  0.0  2.8 22664 14724 ?       S    11:09   0:01 /usr/bin/python2.