Increase randomness of generated CephFSID

Switch from uuid1() to uuid4() so that the resulting
UUID is more random because getnode() is not used.

Change-Id: I611efb6ef5b6e899e3223ecb698e331ed6326c3b
Closes-Bug: #1856762
(cherry picked from commit 90584a801a)

tripleo_common/utils/passwords.py

@@ -55,7 +55,7 @@ def generate_passwords(mistralclient=None, stack_env=None,
         elif name.startswith("Ceph"):
             if name == "CephClusterFSID":
                 # The FSID must be a UUID
-                passwords[name] = six.text_type(uuid.uuid1())
+                passwords[name] = six.text_type(uuid.uuid4())
             else:
                 # CephX keys aren't random strings
                 passwords[name] = create_cephx_key()