- Make exit code nullable and only update of execution status can make it a valid integer
- Update JDBC create/start task execution queries to have exitCode as `null` values
- Update tests to validate/verify the appropirate exit code values for create/start/complete task executions
On merge had to add a pause to the TaskLauncherSinkTests to wait for the task to complete successfully Before we assumed that 0 was a satisfactory result meaning it was either running or completed. Now with the null being returned it could be zero or null. So we have to wait for the task to complete.
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