[goal] Migrate testing to ubuntu focal

As per victoria cycle testing runtime and community goal[1]
we need to migrate upstream CI/CD to Ubuntu Focal(20.04).

Fixing:
- bug#1886298
Bump the lower constraints for required deps which added python3.8 support
in their later version.

Story: #2007865
Task: #40190

Closes-Bug: #1886298

[1] https://governance.openstack.org/tc/goals/selected/victoria/migrate-ci-cd-jobs-to-ubuntu-focal

Change-Id: I5712f29beee2bd7d8ba857c0ce2cd2287646d6b0

.zuul.yaml

@@ -204,7 +204,7 @@
 - project:
     templates:
       - openstack-cover-jobs
-      #- openstack-lower-constraints-jobs
+      - openstack-lower-constraints-jobs
       - openstack-python3-victoria-jobs
       - publish-openstack-docs-pti
       - periodic-stable-jobs
@@ -221,14 +221,6 @@
               - ^etc/.*$
               - ^keystone/tests/unit/.*$
               - ^releasenotes/.*$
-        - openstack-tox-lower-constraints:
-            nodeset: ubuntu-bionic
-            irrelevant-files: &func_irrelevant-files
-              - ^.*\.rst$
-              - ^api-ref/.*$
-              - ^doc/.*$
-              - ^etc/.*$
-              - ^releasenotes/.*$
         - keystone-dsvm-py3-functional-federation-ubuntu-focal:
             voting: false
             irrelevant-files: *irrelevant-files
@@ -257,9 +249,6 @@
         - keystone-tox-protection
     gate:
       jobs:
-        - openstack-tox-lower-constraints:
-            nodeset: ubuntu-bionic
-            irrelevant-files: *func_irrelevant-files
         - keystone-dsvm-py3-functional:
             irrelevant-files: *irrelevant-files
         - keystone-dsvm-py3-functional-federation-ubuntu-focal-k2k:

lower-constraints.txt

@@ -3,9 +3,9 @@ Babel==2.3.4
 bashate==0.5.1
 bcrypt==3.1.3
 coverage==4.0
-cryptography==2.1
+cryptography==2.7
 docutils==0.14
-dogpile.cache==0.6.2
+dogpile.cache==1.0.2
 fixtures==3.0.0
 flake8-docstrings==0.2.1.post1
 flake8==2.6.0
@@ -18,7 +18,7 @@ jsonschema==3.2.0
 keystoneauth1==3.4.0
 keystonemiddleware==7.0.0
 ldappool===2.3.1
-lxml==3.4.1
+lxml==4.5.0
 mock==2.0.0
 msgpack==0.5.0
 oauthlib==0.6.2
@@ -27,7 +27,7 @@ oslo.cache==1.26.0
 oslo.concurrency==3.26.0
 oslo.config==5.2.0
 oslo.context==2.22.0
-oslo.db==4.27.0
+oslo.db==6.0.0
 oslo.i18n==3.15.3
 oslo.log==3.44.0
 oslo.messaging==5.29.0
@@ -48,15 +48,15 @@ python-ldap===3.0.0
 pymongo===3.0.2
 pysaml2==5.0.0
 PyJWT==1.6.1
-PyMySQL==0.7.6
+PyMySQL==0.8.0
 python-keystoneclient==3.8.0
 python-memcached===1.56
 pytz==2013.6
 requests==2.14.2
 scrypt==0.8.0
 six==1.10.0
-sqlalchemy-migrate==0.11.0
+sqlalchemy-migrate==0.13.0
-SQLAlchemy==1.1.0
+SQLAlchemy==1.3.0
 stestr==1.0.0
 stevedore==1.20.0
 tempest==17.1.0

requirements.txt

@@ -6,9 +6,9 @@ pbr!=2.1.0,>=2.0.0 # Apache-2.0
 WebOb>=1.7.1 # MIT
 Flask!=0.11,>=1.0.2  # BSD
 Flask-RESTful>=0.3.5  # BSD
-cryptography>=2.1 # BSD/Apache-2.0
+cryptography>=2.7 # BSD/Apache-2.0
-SQLAlchemy>=1.1.0 # MIT
+SQLAlchemy>=1.3.0 # MIT
-sqlalchemy-migrate>=0.11.0 # Apache-2.0
+sqlalchemy-migrate>=0.13.0 # Apache-2.0
 stevedore>=1.20.0 # Apache-2.0
 passlib>=1.7.0 # BSD
 python-keystoneclient>=3.8.0 # Apache-2.0
@@ -19,7 +19,7 @@ oslo.cache>=1.26.0 # Apache-2.0
 oslo.config>=5.2.0 # Apache-2.0
 oslo.context>=2.22.0 # Apache-2.0
 oslo.messaging>=5.29.0 # Apache-2.0
-oslo.db>=4.27.0 # Apache-2.0
+oslo.db>=6.0.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.log>=3.44.0 # Apache-2.0
 oslo.middleware>=3.31.0 # Apache-2.0
@@ -30,7 +30,7 @@ oslo.utils>=3.33.0 # Apache-2.0
 oauthlib>=0.6.2 # BSD
 pysaml2>=5.0.0
 PyJWT>=1.6.1 # MIT
-dogpile.cache>=0.6.2 # BSD
+dogpile.cache>=1.0.2 # BSD
 jsonschema>=3.2.0 # MIT
 pycadf!=2.0.0,>=1.1.0 # Apache-2.0
 msgpack>=0.5.0 # Apache-2.0

test-requirements.txt

@@ -11,14 +11,14 @@ freezegun>=0.3.6 # Apache-2.0
 pytz>=2013.6 # MIT
 
 # Include drivers for opportunistic testing.
-oslo.db[fixtures,mysql,postgresql]>=4.27.0 # Apache-2.0
+oslo.db[fixtures,mysql,postgresql]>=6.0.0 # Apache-2.0
 
 # computes code coverage percentages
 coverage!=4.4,>=4.0 # Apache-2.0
 # fixture stubbing
 fixtures>=3.0.0 # Apache-2.0/BSD
 # xml parsing
-lxml!=3.7.0,>=3.4.1 # BSD
+lxml>=4.5.0 # BSD
 oslotest>=3.2.0 # Apache-2.0
 
 # test wsgi apps without starting an http server