stop using passlib

passlib is unmaintained and has not had a release since 2020
a recent bcrypt release just broke passlib
see pyca/bcrypt#684

trove's use of passlib is pretty tirval so this change
just removes it as a depency and delegate the random password
generation in trove.common.utils to the generate_random_key
function in the trove.common.crypto_utils module

Change-Id: I6b6c64147c627025d5f89db6032d1c54445df94f

integration/scripts/files/requirements/fedora-requirements.txt

@@ -11,7 +11,6 @@ python-keystoneclient>=2.0.0,!=2.1.0  # Apache-2.0
 kombu>=2.5.0
 babel>=1.3
 python-heatclient>=0.3.0
-passlib
 jinja2>=2.6
 PyMySQL>=0.6.2  # MIT License
 python-neutronclient>=2.3.11,<3

integration/scripts/files/requirements/ubuntu-requirements.txt

@@ -11,7 +11,6 @@ python-keystoneclient>=2.0.0,!=2.1.0  # Apache-2.0
 kombu>=2.5.0
 babel
 python-heatclient>=0.2.9
-passlib
 jinja2
 PyMySQL>=0.6.2  # MIT License
 python-neutronclient>=2.3.6,<3

requirements.txt

@@ -13,7 +13,6 @@ sqlalchemy-migrate>=0.11.0 # Apache-2.0
 netaddr>=0.7.18 # BSD
 httplib2>=0.9.1 # MIT
 lxml!=3.7.0,>=3.4.1 # BSD
-passlib>=1.7.0 # BSD
 python-heatclient>=1.10.0 # Apache-2.0
 python-novaclient>=9.1.0 # Apache-2.0
 python-cinderclient>=3.3.0 # Apache-2.0

trove/common/utils.py

@@ -30,9 +30,9 @@
 from oslo_utils.encodeutils import safe_encode
 from oslo_utils import importutils
 from oslo_utils import strutils
-from passlib import pwd
 
 from trove.common import cfg
+from trove.common import crypto_utils
 from trove.common import exception
 from trove.common.i18n import _
 
@@ -298,7 +298,7 @@ def generate_random_password(password_length=None):
         password_length or
         cfg.get_configuration_property('default_password_length')
     )
-    return pwd.genword(length=password_length)
+    return crypto_utils.generate_random_key(length=password_length)
 
 
 def try_recover(func):