Fix test token duration, minor bug in API

Modify db/fixtures/initial_data.json and settings.py.dist to
fix the duration of the test token.

Fix minor bug in api/util.py when no valid SynnefoUser
could be found or the provided X-Auth-Token was invalid.

api/util.py

@@ -213,9 +213,9 @@ def api_method(http_method=None, atom_allowed=False):
         @wraps(func)
         def wrapper(request, *args, **kwargs):
             try:
+                request.serialization = request_serialization(request, atom_allowed)
                 if not request.user:
                     raise Unauthorized('No user found.')
-                request.serialization = request_serialization(request, atom_allowed)
                 if http_method and request.method != http_method:
                     raise BadRequest('Method not allowed.')
                 

db/fixtures/initial_data.json

@@ -8,9 +8,9 @@
             "uniq" :"test@synnefo.gr",
             "credit": 10,
             "auth_token": "46e427d657b20defe352804f0eb6f8a2",
-            "auth_token_created": "2011-02-06",
+            "auth_token_created": "2011-05-10",
             "type": "STUDENT",
-            "created": "2011-02-06"
+            "created": "2011-05-10"
    	    }
     }
 ] 

settings.py.dist

@@ -184,6 +184,8 @@ APP_INSTALL_URL = "https://login.okeanos.grnet.gr/okeanos"
 
 LOGIN_PATH = "/login"
 
-#Number of hours during which a user token is active
-AUTH_TOKEN_DURATION = 24
+# Number of hours during which a user token is active
+# ACHTUNG: The test token distributed in db/initial_data.json will cease to
+#          work after this many hours after 2011/05/10
+AUTH_TOKEN_DURATION = 30 * 24