Fix missing "$" in the ENFORCE_SCOPE's variable name

Because of the missing "$" before ENFORCE_SCOPE in the lib/neutron
module, it was treated as an ENFORCE_SCOPE string instead of variable
and Neutron was deployed always with old defaults and disabled scope
enforcement.

Change-Id: Ibe67fea634c5f7abb521c0369ff30dd5db84db8c
1 file changed