Environment variables should be substituted when used with include file references

Current Situation

• A number of elements in a job-related configuration can make use of references to include files, e.g. the run-time configuration of a job or order can include a holiday file. To address the file path of the include file the ${SCHEDULER_DATA} variable can be used that will be substituted with the correct value.
• Other environment variables will not be substituted, e.g. ${SCHEDULER_CONFIGURATION_DIRECTORY} will be substituted to nothing.

Desired Behavior

• When addressing an include file for e.g. holidays, parameters and scripts then the value for ${PARAM} should be substituted with the value of the environment variable "PARAM".

Maintainer Notes

• This feature works as designed.
  • Any environment variables can be used that are available for the JobScheduler Master process.
    • This includes environment variables that are propagated with the ./user_bin/jobscheduler_environment_variables.sh | .cmd scripts.
  • Environment variables that are available exclusively for tasks, see Which environment variables are provided by JobScheduler? cannot be used with a configuration file that is applied before a job starts.