feat: ensure env.sh does not fail with unboud var #5203
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If -u is set where this env script is sourced from, it can error out with
./env.sh: line 34: !checkVar: unbound variable
Context
Ado setup breaks when called from a parent with -u set
Description
Set +u so the env.sh script does not error with it`s own onboad var
Risk Assessment (Low / Medium / High)
Low. Unboand var check was not set in the script in the first place and impact is very limited
Unit Tests Added or Updated (Yes / No)
NO
Additional Testing Performed
verified with manual flag setting and running agent