F #6669: Fix regexp to detect port ranges

Current version of the drivers does not check for user input to have the right format

(cherry picked from commit 8ff4b90)

src/vnm_mad/remotes/lib/nic.rb

@@ -72,7 +72,7 @@ class Nic < Hash
             private
 
             def range?(r)
-                return !r.to_s.match(/^\d+([,-]\d+)*$/).nil?
+                return !r.to_s.match(/^\d+(\s*[,-]\s*\d+)*$/).nil?
             end
 
             def range(r)