CFY-5078 updating for the HP Plugin v1.4

Author: EarthmanT

.DS_Store

@@ -7,7 +7,7 @@ description: >
 
 imports:
   - http://www.getcloudify.org/spec/cloudify/3.4m4/types.yaml
-  - http://www.getcloudify.org/spec/host-pool-plugin/1.3.1/plugin.yaml
+  - https://raw.githubusercontent.com/cloudify-cosmo/cloudify-host-pool-plugin/1.4/plugin.yaml
   - types/nodecellar.yaml
   - types/host-pool-types.yaml
 

host-pool-blueprint.yaml

@@ -2,7 +2,12 @@
 node_types:
 
   nodecellar.nodes.Host:
-    derived_from: cloudify.hostpool.nodes.Host
+    derived_from: cloudify.hostpool.nodes.LinuxHost
+    properties:
+      filters:
+        default:
+          tags:
+            - 'ubuntu'
     interfaces:
       cloudify.interfaces.lifecycle:
         create: