restapi: Fix Duplicate Name In Cloud-Init Schema (#1039921)

Duplicate name 'network' in schema violated a name-uniqneness assumption
of python-sdk code generation.

Bug-Url: http://bugzilla.redhat.com/1039921
Change-Id: If251b2ee2dec5660cce04d4e1332f91a33c7485b
Signed-off-by: Ori Liel <oliel@redhat.com>