Fix system tests

Nextcloud has a list of compromised password, and the one used for
system test has been added to this list. So, let's change the password.

Author: nono

tests/system/nextcloud/before-starting/create-account.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 
-# echo -ne fred | md5sum
-export OC_PASS=570a90bfbf8c7eab5dc5d4e26832d5b1
+# echo -ne fred-password | md5sum
+export OC_PASS=796ecbcc9e42a074e22b2c9aa03b79c6
 php occ user:add --password-from-env --display-name="Fred" --group="users" fred

tests/system/tests/webdav_nextcloud.rb

@@ -22,7 +22,7 @@
       host = container.host
       port = container.first_mapped_port
       user = "fred"
-      pass = "570a90bfbf8c7eab5dc5d4e26832d5b1"
+      pass = "796ecbcc9e42a074e22b2c9aa03b79c6"
 
       inst = Instance.create name: "Fred"
       auth = { login: user, password: pass, url: "http://#{host}:#{port}/" }