Description of problem:
Error 500 is displayed when you try to create a new network with External Network Provider check box set
Version-Release number of selected component (if applicable):
How reproducible:
Always
Steps to Reproduce:
1. Create a new network
2. Check External Network provider check box
3.
Actual results:
Error 500 and the network is not created
Expected results:
Network should be created
Additional info: