In case of database error, the scheduler_install_tables.sh script returns, return code 0

Current Situation

• When the user starts the ./scheduler_install_tables.sh and if reporting.hibernate.cfg.xml or hibernate.cfg.xml have wrong database connection cofiguration e.g. wrong username, password, database name etc.
• The script will throw an hibernet error simiar to following error

  Caused by: org.mariadb.jdbc.internal.util.dao.QueryException: Could not connect: Access denied for user 'jobscheduler12x'@'localhost' (using password: YES)
  

• Althought there is an error, the script return a success return code

  docker@osboxes:/opt/sos-berlin.com/jobscheduler$ cd jobscheduler_1.12.4-snapshot/install/
  docker@osboxes:/opt/sos-berlin.com/jobscheduler/jobscheduler_1.12.4-snapshot/install$ ./scheduler_install_tables.sh ; echo $?
  ...the JobScheduler database management system is mysql
  ...installing JobScheduler tables in SQL database which not exist
  Exception in thread "main" java.lang.Exception: connect to database failed: sos.connection.SOSMySQLConnection.connect(80): java.sql.SQLInvalidAuthorizationSpecException: Could not connect: Access denied for user 'jobscheduler12x'@'localhost' (using password: YES)
          at sos.connection.SOSConnectionFileProcessor.init(SOSConnectionFileProcessor.java:66)
          at sos.connection.SOSConnectionFileProcessor.<init>(SOSConnectionFileProcessor.java:47)
          at sos.connection.SOSConnectionFileProcessor.main(SOSConnectionFileProcessor.java:241)
  Caused by: java.lang.Exception: sos.connection.SOSMySQLConnection.connect(80): java.sql.SQLInvalidAuthorizationSpecException: Could not connect: Access denied for user 'jobscheduler12x'@'localhost' (using password: YES)
          at sos.connection.SOSMySQLConnection.connect(SOSMySQLConnection.java:80)
          at sos.connection.SOSConnectionFileProcessor.init(SOSConnectionFileProcessor.java:60)
          ... 2 more
  Caused by: java.sql.SQLInvalidAuthorizationSpecException: Could not connect: Access denied for user 'jobscheduler12x'@'localhost' (using password: YES)
          at org.mariadb.jdbc.internal.util.ExceptionMapper.get(ExceptionMapper.java:121)
          at org.mariadb.jdbc.internal.util.ExceptionMapper.throwException(ExceptionMapper.java:69)
        ..
  	  ..
  	  ..	  
          at org.mariadb.jdbc.internal.util.Utils.retrieveProxy(Utils.java:580)
          at org.mariadb.jdbc.Driver.connect(Driver.java:105)
          ... 4 more
  ...done
  0
  docker@osboxes:/opt/sos-berlin.com/jobscheduler/jobscheduler_1.12.4-snapshot/install$ 
  

Desired Behavior

• In case of hibernet error script should return a non zero return code, indicating an error.