tests: use a more inclusive word for the default password

This change removes problematic language in the test environment.

Change-Id: I6f81ab68314902f0239babf887de04f8e30d8954

tools/docker-compose.yaml

@@ -5,7 +5,7 @@ services:
     container_name: zuul-test-mysql
     image: mysql:5.7
     environment:
-      - MYSQL_ROOT_PASSWORD=insecure_slave
+      - MYSQL_ROOT_PASSWORD=insecure_worker
     ports:
       - "3306:3306"
     tmpfs:

tools/test-setup-docker.sh

@@ -25,7 +25,7 @@ else
 fi
 
 
-MYSQL="${DOCKER} exec zuul-test-mysql mysql  -u root -pinsecure_slave"
+MYSQL="${DOCKER} exec zuul-test-mysql mysql  -u root -pinsecure_worker"
 
 if [ "${COMPOSE}" == "docker-compose" ]; then
   docker-compose rm -sf

tools/test-setup.sh

@@ -25,7 +25,7 @@ sudo service zookeeper start
 
 # The root password for the MySQL database; pass it in via
 # MYSQL_ROOT_PW.
-DB_ROOT_PW=${MYSQL_ROOT_PW:-insecure_slave}
+DB_ROOT_PW=${MYSQL_ROOT_PW:-insecure_worker}
 
 # This user and its password are used by the tests, if you change it,
 # your tests might fail.