Interfacevlanoptions actions

### SetInterfaceVlanOptionsAction

- Param should be a NetworkPort with an associated NetworkPortVlanOptionSettingData.
- Velcity template should merge the options. Supported options are port-mode and native-vlan-id.
- Included tests for action and velocity.

### UnsetInterfaceVlanOptionsAction

- Param should be a NetworkPort.
- Velocty template "replace" the iface vlan options by an empty configuration, in order not to remove the <ethernet-switching> tag.
- Included tests for action and velocity. 

### VLANBridgeCapability
- Update method implemented calling remove and create.