[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#1885825
Fix user creation with GRANT in MySQL 8.0(Ubuntu Focal)
Ubuntu Focal (20.04) has mysql 8.0 and with mysql 8.0 there
is no implicit user creation with GRANT. We need to
create the user first before using GRANT command.

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

Co-Author: wanghao <sxmatch1986@gmail.com>

Story: #2007865
Task: #40229

Closes-Bug: #1885825

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

Change-Id: Ic15dfe480e4d34c3ba102b65153fab1af787bd67

lower-constraints.txt

@@ -1,10 +1,10 @@
 alembic==0.8.10
-autobahn==0.17.1
+autobahn==20.7.1
 Babel==2.3.4
 coverage==4.0
 ddt==1.0.1
 doc8==0.6.0
-dogpile.cache==0.6.2
+dogpile.cache==1.0.2
 enum34==1.0.4;python_version=='2.7'
 falcon==1.1.0
 fixtures==3.0.0
@@ -22,7 +22,7 @@ os-testr==1.0.0
 oslo.cache==1.26.0
 oslo.config==5.2.0
 oslo.context==2.19.2
-oslo.db==4.27.0
+oslo.db==6.0.0
 oslo.i18n==3.15.3
 oslo.log==3.36.0
 oslo.messaging==5.29.0
@@ -38,20 +38,20 @@ osprofiler==1.4.0
 pbr==2.0.0
 Pygments==2.2.0
 pymongo==3.6.0
-PyMySQL==0.7.6
+PyMySQL==0.8.0
 python-keystoneclient==3.8.0
 python-memcached==1.56
 python-subunit==1.0.0
 python-swiftclient==3.2.0
 pytz==2013.6
-PyYAML==3.12
+PyYAML==3.13
 redis==3.0.0
 requests==2.14.2
 requestsexceptions==1.2.0
 restructuredtext-lint==1.1.1
 rfc3986==0.3.1
 six==1.10.0
-SQLAlchemy==1.0.10
+SQLAlchemy==1.3.19
 sqlalchemy-migrate==0.11.0
 stestr==2.0.0
 stevedore==1.20.0

requirements.txt

@@ -18,7 +18,7 @@ six>=1.10.0 # MIT
 oslo.cache>=1.26.0 # Apache-2.0
 oslo.config>=5.2.0 # Apache-2.0
 oslo.context>=2.19.2 # 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>=3.36.0 # Apache-2.0
 oslo.messaging>=5.29.0 # Apache-2.0
@@ -28,7 +28,7 @@ oslo.upgradecheck>=0.1.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 oslo.policy>=1.30.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
-SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
-autobahn>=0.17.1 # MIT License
+SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.3.19 # MIT
+autobahn>=20.7.1 # MIT License
 requests>=2.14.2 # Apache-2.0
 futurist>=1.2.0 # Apache-2.0

test-requirements.txt

@@ -12,7 +12,7 @@ redis>=3.0.0 # MIT
 pymongo>=3.6.0 # Apache-2.0
 python-swiftclient>=3.2.0 # Apache-2.0
 websocket-client>=0.44.0 # LGPLv2+
-PyMySQL>=0.7.6 # MIT License
+PyMySQL>=0.8.0 # MIT License
 
 # Unit testing
 coverage!=4.4,>=4.0 # Apache-2.0
@@ -23,7 +23,6 @@ fixtures>=3.0.0 # Apache-2.0/BSD
 
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
-oslo.db>=4.27.0 # Apache-2.0
 testresources>=2.0.0 # Apache-2.0/BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=2.0.0

tools/test-setup.sh

@@ -23,11 +23,11 @@ sudo -H mysqladmin -u root password $DB_ROOT_PW
 sudo -H mysql -u root -p$DB_ROOT_PW -h localhost -e "
     DELETE FROM mysql.user WHERE User='';
     FLUSH PRIVILEGES;
-    GRANT ALL PRIVILEGES ON *.*
-        TO '$DB_USER'@'%' identified by '$DB_PW' WITH GRANT OPTION;"
+    CREATE USER '$DB_USER'@'%' IDENTIFIED BY '$DB_PW';
+    GRANT ALL PRIVILEGES ON *.* TO '$DB_USER'@'%' WITH GRANT OPTION;"
 
 # Now create our database.
 mysql -u $DB_USER -p$DB_PW -h 127.0.0.1 -e "
     SET default_storage_engine=MYISAM;
     DROP DATABASE IF EXISTS openstack_citest;
-    CREATE DATABASE openstack_citest CHARACTER SET utf8;"
+    CREATE DATABASE openstack_citest CHARACTER SET utf8;"