Adding UT to for get on WEP
Adding UT to for get on WEP

We had an issue at one point where doing a get on a non-existant WEP did
not throw an error. While this appears to be fixed I figure it is worth
adding a UT for.

insequent/libcalico-go,projectcalico/libcalico-go,insequent/libcalico-go,projectcalico/libcalico-go