wheezy: fix is_safe attribute of template filters

In Django 1.4 'is_safe' and 'needs_autoescape' attributes has been made
keyword arguments of @register.filter

snf-cyclades-app/synnefo/helpdesk/templatetags/helpdesk_tags.py

@@ -2,6 +2,7 @@ from django import template
 
 register = template.Library()
 
+
 @register.filter(name="vm_public_ip")
 def vm_public_ip(vm):
     """
@@ -23,7 +24,9 @@ VM_STATE_CSS_MAP = {
         'ACTIVE': 'success',
         'DESTROYED': 'inverse'
 }
-@register.filter(name="object_status_badge")
+
+
+@register.filter(name="object_status_badge", is_safe=True)
 def object_status_badge(vm_or_net):
     """
     Return a span badge styled based on the vm current status
@@ -38,9 +41,8 @@ def object_status_badge(vm_or_net):
         deleted_badge = '<span class="badge badge-important">Deleted</span>'
     return '%s\n<span class="%s">%s</span>' % (deleted_badge, badge_cls, state)
 
-object_status_badge.is_safe = True
 
-@register.filter(name="network_deleted_badge")
+@register.filter(name="network_deleted_badge", is_safe=True)
 def network_deleted_badge(network):
     """
     Return a span badge styled based on the vm current status
@@ -50,18 +52,16 @@ def network_deleted_badge(network):
         deleted_badge = '<span class="badge badge-important">Deleted</span>'
     return deleted_badge
 
-network_deleted_badge.is_safe = True
 
-@register.filter(name="get_os")
+@register.filter(name="get_os", is_safe=True)
 def get_os(vm):
     try:
         return vm.metadata.filter(meta_key="OS").get().meta_value
     except:
         return "unknown"
 
-get_os.is_safe = True
 
-@register.filter(name="network_vms")
+@register.filter(name="network_vms", is_safe=True)
 def network_vms(network, account, show_deleted=False):
     vms = []
     nics = network.nics.filter(machine__userid=account)
@@ -71,7 +71,6 @@ def network_vms(network, account, show_deleted=False):
         vms.append(nic.machine)
     return vms
 
-network_vms.is_safe = True
 
 @register.filter(name="network_nics")
 def network_nics(network, account, show_deleted=False):
@@ -81,7 +80,8 @@ def network_nics(network, account, show_deleted=False):
         nics = nics.filter(machine__deleted=False).distinct()
     return nics
 
-@register.filter(name="backend_info")
+
+@register.filter(name="backend_info", is_safe=True)
 def backend_info(vm):
     content = ""
     backend = vm.backend
@@ -96,5 +96,3 @@ def backend_info(vm):
         content += '<dt>Backend ' + field.name + '</dt><dd>' + \
                    str(getattr(backend, field.name)) + '</dd>'
     return content
-
-backend_info.is_safe = True