Drop block storage v2 API

Cinder has dropped block storage v2 API [1].
This patch update python-cinderclient to 8.0.0 and also update its
depending packages.

- python-cinderclient 8.0.0 depends on keystoneauth1>=4.3.1
- python-cinderclient 8.0.0 depends on oslo.i18n>=5.0.1
- python-cinderclient 8.0.0 depends on oslo.utils>=4.8.0
- oslo-utils 4.8.0 depends on packaging>=20.4
- python-cinderclient 8.0.0 depends on pbr>=5.5.0
- python-cinderclient 8.0.0 depends on requests>=2.25.1
- python-cinderclient 8.0.0 depends on stevedore>=3.3.0

[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-November/018876.html

Change-Id: I1f029dc1a04d5a92e5078c3abb1c8d3d3c679bdc

lower-constraints.txt

@@ -35,7 +35,7 @@ jmespath==0.9.3
 jsonpatch==1.21
 jsonpointer==2.0
 jsonschema==2.6.0
-keystoneauth1==3.6.2
+keystoneauth1==4.3.1
 linecache2==1.0.0
 MarkupSafe==1.0
 monotonic==1.4
@@ -52,16 +52,16 @@ osc-lib==1.10.0
 oslo.concurrency==3.26.0
 oslo.config==5.2.0
 oslo.context==2.22.0
-oslo.i18n==3.20.0
+oslo.i18n==5.0.1
 oslo.log==3.36.0
 oslo.policy==1.30.0
 oslo.serialization==2.18.0
 oslo.upgradecheck==0.1.1
-oslo.utils==3.36.0
+oslo.utils==4.8.0
 oslosphinx==4.7.0
 osprofiler==2.3.0
-packaging==17.1
-pbr==2.0.0
+packaging==20.4
+pbr==5.5.0
 pep8==1.5.7
 Pint==0.5
 positional==1.2.1
@@ -72,7 +72,7 @@ pymongo==3.0.2
 pyOpenSSL==19.1.0
 pyparsing==2.2.0
 pyperclip==1.6.0
-python-cinderclient==5.0.0
+python-cinderclient==8.0.0
 python-dateutil==2.7.0
 python-glanceclient==2.8.0
 python-keystoneclient==3.22.0
@@ -83,13 +83,13 @@ python-swiftclient==3.2.0
 python-tackerclient==0.8.0
 pytz==2018.3
 PyYAML==3.12
-requests==2.18.4
+requests==2.25.1
 requestsexceptions==1.4.0
 rfc3986==1.1.0
 semantic-version==2.3.1
 simplejson==3.13.2
 snowballstemmer==1.2.1
-stevedore==1.28.0
+stevedore==3.3.0
 termcolor==1.1.0
 traceback2==1.4.0
 unittest2==1.1.0

requirements.txt

@@ -10,7 +10,7 @@
 Django>=2.2 # BSD
 oslo.log>=3.36.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
-pbr!=2.1.0,>=2.0.0 # Apache-2.0
+pbr>=5.5.0 # Apache-2.0
 python-tackerclient>=0.8.0 # Apache-2.0
 
 # This will be installed from git in OpenStack CI if the job setting