Allow to specify MySQL port for test environment

In case for whatever reason there is already another
MySQL server running on the standard port developers
may want to run the MySQL test-server on a different
port. This can be done by specifying an environment
variable "ZUUL_MYSQL_PORT":

export ZUUL_MYSQL_PORT=3307
tools/test-setup-docker.sh
tox -e py3

Change-Id: Id32bac1a87619803d973b066762d525bd9a4f913

tests/base.py

@@ -4023,7 +4023,9 @@ class MySQLSchemaFixture(fixtures.Fixture):
         self.name = '%s_%s' % (random_bits, os.getpid())
         self.passwd = uuid.uuid4().hex
         self.host = os.environ.get('ZUUL_MYSQL_HOST', '127.0.0.1')
+        self.port = int(os.environ.get('ZUUL_MYSQL_PORT', 3306))
         db = pymysql.connect(host=self.host,
+                             port=self.port,
                              user="openstack_citest",
                              passwd="openstack_citest",
                              db="openstack_citest")
@@ -4039,13 +4041,19 @@ class MySQLSchemaFixture(fixtures.Fixture):
         finally:
             db.close()
 
-        self.dburi = 'mysql+pymysql://{name}:{passwd}@{host}/{name}'.format(
-            name=self.name, passwd=self.passwd, host=self.host)
+        self.dburi = 'mysql+pymysql://{name}:{passwd}@{host}:{port}/{name}'\
+            .format(
+                name=self.name,
+                passwd=self.passwd,
+                host=self.host,
+                port=self.port
+            )
         self.addDetail('dburi', testtools.content.text_content(self.dburi))
         self.addCleanup(self.cleanup)
 
     def cleanup(self):
         db = pymysql.connect(host=self.host,
+                             port=self.port,
                              user="openstack_citest",
                              passwd="openstack_citest",
                              db="openstack_citest")

tools/docker-compose.yaml

@@ -7,7 +7,7 @@ services:
     environment:
       - MYSQL_ROOT_PASSWORD=insecure_worker
     ports:
-      - "3306:3306"
+      - "${ZUUL_MYSQL_PORT:-3306}:3306"
     tmpfs:
       - /var/lib/mysql
     volumes:

tox.ini

@@ -27,6 +27,7 @@ passenv =
   OS_STDOUT_CAPTURE
   YARN_REGISTRY
   ZUUL_MYSQL_HOST
+  ZUUL_MYSQL_PORT
   ZUUL_POSTGRES_HOST
   ZUUL_SCHEDULER_COUNT
   ZUUL_TEST_ROOT