Allow to set address-related parameters in interface arguments

There is a fixed list of allowed parameters that can be set
as interface parameters to override the values from cluster model.

List of allowed parameters can be found in the file:
{# roles #}/_linux_network_interface

Example for single_address, control_network_netmask and control_vlan:

    kvm01.mcp11-ovs-dpdk.local:
      reclass_storage_name: infra_kvm_node01
      roles:
      - infra_kvm
      - linux_system_codename_xenial
      interfaces:
        ens3:
          role: single_dhcp
        ens4:
          role: single_vlan_ctl
          single_address: 1.2.3.4
          control_network_netmask: 255.255.252.0
          control_vlan: 1234

Change-Id: I52f1250a3af510275d7741a1717a04be348778b8
diff --git "a/\173\043 interfaces \043\175/single_mgm" "b/\173\043 interfaces \043\175/single_mgm"
index a0de958..78b0ca1 100644
--- "a/\173\043 interfaces \043\175/single_mgm"
+++ "b/\173\043 interfaces \043\175/single_mgm"
@@ -7,7 +7,6 @@
 {#-   _param:deploy_network_gateway         #}
 {#-   _param:dns_server01         #}
 {#-   _param:dns_server02         #}
-
               # {{ interfaces_role }}
               {%- set interface_name = interfaces.keys()[0] %}
               {{ interface_name }}:
@@ -27,4 +26,4 @@
                 proto: static
                 type: bridge
                 use_interfaces:
-                - {{ interface_name }}
+                - {{ interface_name }}
\ No newline at end of file