Adding Configure VLAN role support for Cisco-IOS devices

[justjais]

Added configure_vlan and configure_vlan jinja template for Cisco IOS device provider to configure vlan using ios device provider role.

To configure vlan via this role user needs to build their playbook as:

---
- hosts: ios
  gather_facts: no
  tasks:
    - import_role:
        name: cisco_ios
        tasks_from: configure_vlans
      vars:
        vlans:
          - interface: GigabitEthernet 0/2
            id: 30
            bridge_group: 10
            description: this is Vlan with ID 30
            ppoe: enable
            #state: absent

[softwarefactory-project-zuul]

Build succeeded.

• tox-linters : SUCCESS in 3m 18s
• dco-license : SUCCESS in 32s

[trishnaguha]

I thought we agreed on having Python module.