fixed tests

Status Job ID Name Coverage
  Windows
failed #594919
Windows10
masterJobWindows

00:00:51

 
  Linux
skipped #594920
BranchJobLinux
 
Name Stage Failure
failed
masterJobWindows Windows There is an unknown failure, please try again
[ERROR]   location: variable configuration of type de.monticore.lang.monticar.cnntrain._symboltable.ConfigurationSymbol
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
ERROR: Job failed: exit status 1