Change default MySQL root password

MySQL 8.0 in Docker was ignoring the MYSQL_ROOT_PASSWORD
environment variable, setting the default user/pass to root
and password. Update the env vars in the dev stack to match
these values.

LNX-docker-compose.yml

@@ -9,7 +9,7 @@ services:
     <<: *net
     image: datajoint/mysql:${MYSQL_VER:-8.0}
     environment:
-      - MYSQL_ROOT_PASSWORD=${DJ_PASS:-simple}
+      - MYSQL_ROOT_PASSWORD=${DJ_PASS:-password}
     command: mysqld --default-authentication-plugin=mysql_native_password
     # ports:
     #   - "3306:3306"
@@ -70,7 +70,7 @@ services:
     environment:
       - DJ_HOST=fakeservices.datajoint.io
       - DJ_USER=root
-      - DJ_PASS=simple
+      - DJ_PASS=password
       - DJ_TEST_HOST=fakeservices.datajoint.io
       - DJ_TEST_USER=datajoint
       - DJ_TEST_PASSWORD=datajoint