[Gemfile] weathermap is now using cacti version 2.5

Gemfile

@@ -8,7 +8,7 @@ gem "net-admin-common",
   :tag => "2.3"
 gem "cacti-play",
   :git => "ssh://g5kadmin@git.grid5000.fr/srv/git/repos/cacti-play",
-  :tag => "2.4"
+  :tag => "2.5"
 gem "weathermap",
   :git => "ssh://g5kadmin@git.grid5000.fr/srv/git/repos/weathermap",
   :tag => "5.5"

Gemfile.lock

 GIT
   remote: ssh://g5kadmin@git.grid5000.fr/srv/git/repos/cacti-play
-  revision: 1912fcc73ba790370b62d8b9792a35485bb498f6
-  tag: 2.4
+  revision: f4a515c1a79337966b54a327c01fa9b1e69147f6
+  tag: 2.5
   specs:
-    cacti-play (2.4)
+    cacti-play (2.5)
       net-admin-common (>= 2.2)
 
 GIT