always ignore ssh security

tests/test_backup.py

@@ -14,7 +14,7 @@ from datetime import datetime
 os.chdir(os.path.dirname(__file__))
 
 def test_ssh(server):
-    status, out = subprocess.getstatusoutput('ssh %s ls /tmp' % server) 
+    status, out = subprocess.getstatusoutput('ssh -o StrictHostKeyChecking=no %s ls /tmp' % server) 
     return status == 0
 
 def test_last_backup_is_recent(server, client):