enable "VMware NSX" settings block when NSX was selected
enable "VMware NSX" settings block when NSX was selected

- make NSX settings block untogglable and disabled by default
- enable NSX settings block on Settings tab via bind

Closes-bug: #1347665
Change-Id: I43d639a3daf8b037a2a3bb2f462e3aa1d870e646

nebril/fuel-web,nebril/fuel-web,SmartInfrastructures/fuel-web-dev,nebril/fuel-web,prmtl/fuel-web,koder-ua/nailgun-fcert,zhaochao/fuel-web,koder-ua/nailgun-fcert,stackforge/fuel-web,huntxu/fuel-web,nebril/fuel-web,SmartInfrastructures/fuel-web-dev,nebril/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,stackforge/fuel-web,eayunstack/fuel-web,stackforge/fuel-web,koder-ua/nailgun-fcert,zhaochao/fuel-web,eayunstack/fuel-web,zhaochao/fuel-web,huntxu/fuel-web,zhaochao/fuel-web,zhaochao/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,prmtl/fuel-web,SmartInfrastructures/fuel-web-dev,huntxu/fuel-web,prmtl/fuel-web,prmtl/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,koder-ua/nailgun-fcert