Rename mariadb env vars

[SamuelWei]

Fixes #

Type (Highlight the corresponding type)

• Bugfix
• Feature
• Documentation
• Refactoring (e.g. Style updates, Test implementation, etc.)
• Other (please describe):

Checklist

• Code updated to current develop branch head
• Passes CI checks
• Is a part of an issue
• Tests added for the bugfix or newly implemented feature, describe below why if not
• Changelog is updated
• Documentation of code and features exists

Changes

Other information

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.03%. Comparing base (4e42e99) to head (909b309).
Report is 5 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #1722   +/-   ##
==========================================
  Coverage      81.03%   81.03%           
  Complexity      1340     1340           
==========================================
  Files            361      361           
  Lines           9223     9223           
  Branches         851      851           
==========================================
  Hits            7474     7474           
  Misses          1749     1749           

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[cypress]

PILOS    Run #1486

Run Properties:   Passed #1486  •  909b3092c7: Rename mariadb env vars

Project	PILOS
Branch Review	rename-mariadb-env-vars
Run status	Passed #1486
Run duration	05m 05s
Commit	909b3092c7: Rename mariadb env vars
Committer	Samuel Weirich
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	237
View all changes introduced in this branch ↗︎