Make mgmt network detachable from no box VMs

Pxe nodes are not provisioned, mgmt network is not required for them.
Provide new domain option 'mgmt_attach' which one can use to remove mgmt
interface from VM. Default behaviour is not changed.
Also take into account bridge interfaces when set boot order, to support
scenario when we would like to use vagrant VM to pxe boot physical nodes
in existing network.

lib/vagrant-libvirt/action.rb

@@ -105,7 +105,7 @@ module VagrantPlugins
                 b3.use ForwardPorts
                 b3.use PrepareNFSSettings
                 b3.use ShareFolders
-             end
+              end
             end
           end
         end

lib/vagrant-libvirt/action/set_boot_order.rb

@@ -86,7 +86,7 @@ module VagrantPlugins
 
         def search_network(nets, xml)
           str = '/domain/devices/interface'
-          str += "[(@type='network' or @type='udp')"
+          str += "[(@type='network' or @type='udp' or @type='bridge')"
           unless nets.empty?
             str += " and source[@network='#{nets.first['network']}']"
           end

lib/vagrant-libvirt/config.rb

@@ -128,6 +128,9 @@ module VagrantPlugins
       # Autostart
       attr_accessor :autostart
 
+      # Attach mgmt network
+      attr_accessor :mgmt_attach
+
       def initialize
         @uri               = UNSET_VALUE
         @driver            = UNSET_VALUE
@@ -212,6 +215,9 @@ module VagrantPlugins
 
         # Autostart
         @autostart         = UNSET_VALUE
+
+        # Attach mgmt network
+        @mgmt_attach       = UNSET_VALUE
       end
 
       def boot(device)
@@ -577,6 +583,9 @@ module VagrantPlugins
 
         # Autostart
         @autostart = false if @autostart == UNSET_VALUE
+
+        # Attach mgmt network
+        @mgmt_attach = true if @mgmt_attach == UNSET_VALUE
       end
 
       def validate(machine)

lib/vagrant-libvirt/errors.rb

@@ -108,6 +108,10 @@ module VagrantPlugins
         error_key(:tunnel_port_not_defined)
       end
 
+      class ManagementNetworkRequired < VagrantLibvirtError
+        error_key(:management_network_required)
+      end
+
       # Other exceptions
       class InterfaceSlotNotAvailable < VagrantLibvirtError
         error_key(:interface_slot_not_available)

lib/vagrant-libvirt/util/network_util.rb

@@ -44,8 +44,18 @@ module VagrantPlugins
             management_network_options[:mac] = management_network_mac
           end
 
+          if (env[:machine].config.vm.box &&
+              !env[:machine].provider_config.mgmt_attach)
+            raise Errors::ManagementNetworkRequired
+          end
+
           # add management network to list of networks to check
-          networks = [management_network_options]
+          # unless mgmt_attach set to false
+          networks = if env[:machine].provider_config.mgmt_attach
+                       [management_network_options]
+                     else
+                       []
+                     end
 
           env[:machine].config.vm.networks.each do |type, original_options|
             logger.debug "In config found network type #{type} options #{original_options}"