Add Logging to track progress of workflow in WorkflowInterpreter
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Key: AIRAVATA-354
URL: https://issues.apache.org/jira/browse/AIRAVATA-354
Project: Airavata
Issue Type: Improvement
Components: Workflow Interpreter
Reporter: Raminderjeet Singh
We need logs, in server mode specially: if developer wants to track the
progress of running workflows and add some debug information.
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