modified 'create new instance' screen with compute details

computes/models.py

@@ -48,6 +48,10 @@ class Compute(Model):
     @cached_property
     def cpu_count(self):
         return self.proxy.get_node_info()[3]
+    
+    @cached_property
+    def cpu_usage(self):
+        return round(self.proxy.get_cpu_usage().get('usage'))
 
     @cached_property
     def ram_size(self):