Fix compatibility with latest oslo.config

With recent versions of oslo.config the tests have started to fail
because the multistring opt used for specifying input subunit file paths
was getting an implicit required. However it's not a required field just
positional. This commit fixes this issue by explicitly setting it to not
be requried and setting a default value of None for it. I'm not sure when
an implicit required was added in oslo.config, but this should fix it
regardless of which oslo.config version is used.

Fixing other gate failure also for pythin 2.7 & 3.8 compatibility.

- with mysql 8.0 there is no implicit user creation with GRANT. we
need to create user first.

- hacking version used is too old which pull old pyflakes (< 2.1.0) not
compatible with py3.8. Bumping hacking version to 1.1.0 (not latest which needs
lot of updates in code) so that it allow to pull the 2.1.1 pyflakes.

for openstack-tox-py27 we need to cap stestr with <3.0.0 so that it can pull
stestr py2 compatible version.

Story: 2008348
Task: 41250

Change-Id: I219755d98d9f8b5a284c0e858b60f852b948c8d4

subunit2sql/shell.py

@@ -31,7 +31,8 @@ CONF = cfg.CONF
 CONF.import_opt('verbose', 'subunit2sql.db.api')
 
 SHELL_OPTS = [
-    cfg.MultiStrOpt('subunit_files', positional=True,
+    cfg.MultiStrOpt('subunit_files', positional=True, required=False,
+                    default=None,
                     help='list of subunit files to put into the database'),
     cfg.DictOpt('run_meta', short='r', default=None,
                 help='Dict of metadata about the run(s)'),

test-requirements.txt

@@ -1,11 +1,16 @@
-hacking>=0.12.0,!=0.13.0,<0.14
+hacking>=1.1.0,<2.0.0
+# remove this pyflakes from here once you bump the
+# hacking to 3.2.0 or above. hacking 3.2.0 takes
+# care of pyflakes version compatibilty with python 3.8.
+pyflakes>=2.1.1
 coverage>=3.6
 fixtures>=0.3.14
 mock>=1.0
 sphinx!=1.6.6,!=1.6.7,<2.0.0;python_version=='2.7'  # BSD
 sphinx!=1.6.6,!=1.6.7,!=2.1.0;python_version>='3.4'  # BSD
 testscenarios>=0.4
-stestr>=1.0.0
+stestr<3.0.0;python_version=='2.7'  # BSD
+stestr>=1.0.0;python_version>='3.4'  # BSD
 testtools>=0.9.34
 PyMySql
 psycopg2

tools/test-setup.sh

@@ -23,8 +23,8 @@ 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 "