[aws|compute] tweaks for tags lookups

lib/fog/aws/models/compute/image.rb

@@ -36,13 +36,13 @@ module Fog
 
           return true
         end
-        
+
         def tags
           requires :id
 
-          connection.tags(:filters => {'resource-id' => @id})
+          connection.tags.all('resource-id' => identity)
         end
-                
+
       end
 
     end

lib/fog/aws/models/compute/server.rb

@@ -188,11 +188,10 @@ module Fog
           connection.stop_instances(@id)
           true
         end
-        
+
         def tags
           requires :id
-
-          connection.tags(:filters => {'resource-id' => @id})
+          connection.tags.all('resource-id' => identity)
         end
 
         def username
@@ -201,7 +200,6 @@ module Fog
 
         def volumes
           requires :id
-
           connection.volumes(:server => self)
         end
 

lib/fog/aws/models/compute/snapshot.rb

@@ -39,9 +39,13 @@ module Fog
           true
         end
 
+        def tags
+          requires :id
+          connection.tags.all('resource-id' => identity)
+        end
+
         def volume
           requires :id
-
           connection.describe_volumes(@volume_id)
         end
 

lib/fog/aws/models/compute/volume.rb

@@ -59,14 +59,12 @@ module Fog
 
         def snapshots
           requires :id
-
           connection.snapshots(:volume => self)
         end
-        
+
         def tags
           requires :id
-
-          connection.tags(:filters => {'resource-id' => @id})
+          connection.tags.all('resource-id' => identity)
         end
 
         private