Fix MongoDB job restart failure after abrupt shutdown #4957
      
        
          +126
        
        
          −43
        
        
          
        
      
    
  
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Fixes #4943 where job restart fails after abrupt shutdown because getLastStepExecution() only checks the empty stepExecutions array in BATCH_JOB_EXECUTION instead of the BATCH_STEP_EXECUTION collection.
Changes: