Enabling vlan_splinters

https://blueprints.launchpad.net/fuel/+spec/ovs-vlan-splinters
(porting from 3.2.1)
FIX: bug/1257904

puppet send non-boolean value instead true/false
Merge pull request #902 from xenolog/bp/ovs-vlan-splinters_4.0

Enabling vlan_splinters (4.0)