remove-xen: Fix minor bugs

src/vmm_mad/exec/one_vmm_exec.rb

@@ -142,6 +142,7 @@ class VmmAction
         ID DEPLOY_ID
         TEMPLATE/SECURITY_GROUP_RULE
         HISTORY_RECORDS/HISTORY/HOSTNAME
+        HISTORY_RECORDS/HISTORY/VMMMAD
     )
 
     DRIVER_NAMES = {

src/vmm_mad/remotes/kvm/poll

@@ -412,6 +412,8 @@ module KVM
                         next if source == snap
                     end
 
+                    next if File.symlink?(snap)
+
                     text = `qemu-img info --output=json #{snap}`
                     next if !$? || !$?.success?
 

src/vnm_mad/remotes/lib/nic.rb

@@ -26,7 +26,7 @@ module VNMNetwork
     # to create VMs of the given hyprtvisor
     class Nics < Array
         def initialize(hypervisor)
-            @nicClass = HYPERVISORS[hypervisor]
+            @nicClass = HYPERVISORS[hypervisor] || NicKVM
         end
 
         def new_nic

src/vnm_mad/remotes/lib/vm.rb

@@ -78,7 +78,7 @@ module VNMNetwork
         # Gets the Hypervisor VMMMAD from the Template
         # @return [String] name of the hypervisor driver
         def hypervisor
-            xpath = 'HISTORY_RECORDS/HISTORY[last()]/VMMMAD'
+            xpath = 'HISTORY_RECORDS/HISTORY/VMMMAD'
             @vm_root.root.elements[xpath].text
         end