Enable spring profile mysql

[marcellom]

• Launch the Application with --spring.profiles.active=mysql for using MySQL
• Dockerfile has been cleaned, now only using env variables Docker compose configuration looks like: environment:
  • NFVO_RABBIT_BROKERIP=${HOST_IP}
  • SPRING_RABBITMQ_HOST=rabbitmq_broker
  • SPRING_PROFILES_ACTIVE=mysql
  • SPRING_DATASOURCE_URL=jdbc:mysql://nfvo_database:3306/openbaton?useSSL=false