Adds RESTlike methods to Plan of Planning service

Adds destroy, save, create and update methods to Plan
model of OpenStack Planning service.

lib/fog/openstack/models/planning/plan.rb

@@ -52,6 +52,29 @@ module Fog
         def remove_role(role_uuid)
           service.remove_role_from_plan(uuid, role_uuid)
         end
+
+        def destroy
+          requires :uuid
+          service.delete_plan(uuid)
+          true
+        end
+
+        def save
+          requires :name
+          identity ? update : create
+        end
+
+        def create
+          requires :name
+          merge_attributes(service.create_plan(self.attributes).body)
+          self
+        end
+
+        def update(parameters=nil)
+          requires :uuid
+          merge_attributes(service.patch_plan(uuid, parameters).body)
+          self
+        end
       end
     end
   end

tests/openstack/models/planning/plan_tests.rb

@@ -31,5 +31,21 @@ Shindo.tests("Fog::Openstack[:planning] | plan", ['openstack']) do
     tests('#remove_role').succeeds do
       @instance.remove_role(@role['uuid'])
     end
+
+    tests('#save').succeeds do
+      @instance.save
+    end
+
+    tests('#update').succeeds do
+      @instance.update
+    end
+
+    tests('#destroy').succeeds do
+      @instance.destroy
+    end
+
+    tests('#create').succeeds do
+      @instance.create
+    end
   end
 end