Finishing touches for WS-207

Goals of this MR:

Workflow templates:

• Update std_calibration to use PEX format (and to use productfetcher)
• Update test_download to use productfetcher

Local environment:

• Fix permissions error when copying wf_framework scripts to workflow directory
• Add retry loop to PEX building command to prevent it from failing out
• Remove creation of user submituser as we decided to use vlapipe to submit jobs
• Updated local environment so that test_download workflow successfully runs in the local cluster

wf_monitor

• Updated wf_monitor to make "looking for log file" timeout work as intended