Update LDAP parameters

[dtrdnk]

…From for loading env from secrets, and subsets them. Fix LDAP parameters

What this PR does / why we need it:

Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

• fixes #

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Checklist

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• [x] DCO signed
• [x] Chart Version bumped
• [x] Variables are documented in the README.md