Get numbered job history line from job summary file
Inputs: Parm1 = Job Instance UJP pathname
Parm3 = History number to retrieve
Output: Parm2 = Retrieved History line
Parm2 = (empty) (indicates no such history line)
Returns: Value passed in Parm3 (or -1 if no matching line)
This function retrieves the last line of the job history which has the passed Parm3 value in square brackets. The line is returned in Parm2 and includes the inserted timestamp and the numeric value in square brackets.
When the function returns with an empty value in Parm2 there is no matching line in the history.