Fix test_generate_certificate

slapos/libnetworkcachetests.py

 import BaseHTTPServer
+import datetime
 import errno
 import hashlib
 import httplib
@@ -924,12 +925,13 @@ class GenerateSignatureScriptTest(unittest.TestCase):
   def test_generate_certificate(self):
     slapos.signature.generateCertificate(self.certificate, self.key,
       self.common_name)
+    today = datetime.date.today()
     result = subprocess.check_output(['openssl', 'x509', '-noout', '-subject',
       '-in', self.certificate])
     self.assertEqual('subject= /CN=%s' % self.common_name, result.strip())
     result = subprocess.check_output(['openssl', 'x509', '-noout', '-enddate',
       '-in', self.certificate])
-    self.assertTrue('2112' in result)
+    self.assertTrue(' %s ' % (today.year + 100) in result)
 
   def test_generate_key_exists(self):
     self.assertRaises(ValueError, slapos.signature.generateCertificate,