create ns instance from ns list; minor fix

Change-Id: I31e3b349e86f67e776b85c2484f455c3594da0a6
Signed-off-by: lombardof <flombardo@cnit.it>
diff --git a/projecthandler/urls/project.py b/projecthandler/urls/project.py
index 61e4d4e..2b2f824 100644
--- a/projecthandler/urls/project.py
+++ b/projecthandler/urls/project.py
@@ -35,7 +35,7 @@
     url(r'^(?P<project_id>\d+)/graph/addlink$', views.add_link, name='addlink'),
     url(r'^(?P<project_id>\d+)/graph/removelink$', views.remove_link, name='removelink'),
     url(r'^(?P<project_id>\d+)/graph/availablenodes', views.get_available_nodes, name='get_available_nodes'),
-    url(r'^(?P<project_id>\d+)/descriptors/(?P<descriptor_type>\w+)(/$)', views.show_descriptors, name='list_descriptors'),
+    url(r'^(?P<project_id>\d+)/descriptors/(?P<descriptor_type>\w+)/list$', views.show_descriptors, name='list_descriptors'),
     url(r'^(?P<project_id>\d+)/descriptors/(?P<descriptor_type>\w+)/(?P<descriptor_id>[-\w]+)(/$)',
         views.edit_descriptor, name='edit_descriptor'),
     url(r'^(?P<project_id>\d+)/descriptors/(?P<descriptor_type>\w+)/(?P<descriptor_id>[-\w]+)/delete$',