Provide built-in variables for a job's timeout and grace period settings

Feature

• The JS7 Agent should provide the built-in variables
  • $js7Job.timeoutMillis
  • $js7Job.sigkillDelayMillis
• The variables correspond to related job settings. They are provided similarly to existing variables such as $js7JobName, $js7Label etc.
• When using such variables in assignments to arguments or environment variables then users should consider
  • to apply the syntax ${js7Job.timeoutMilis}, ${js7Job.sigkillDelayMillis} that is required due to the dot in the variable's name.
  • that both variables might not be assigned values.
    • Users can apply the following syntax that considers missing values using the ? operator:

         "env": {
                "JOB_TIMEOUT": "\"${js7Job.timeoutMillis}?\""
                "JOB_GRACE_TIMEOUT": "\"${js7Job.sigkillDelayMillis}?\""
              }
      

    • When used for assignment with environment variables then no environment variable will be created for a variable with a missing value.