remove references to admindbuser

[niravparikh05]

What does this PR change?

• remove references to admindbuser

Does the PR depend on any other PRs or Issues? If yes, please list them.

• No

Checklist

I confirm, that I have...

• Read and followed the contributing guide in CONTRIBUTING.md
• Added tests for this PR
• Formatted the code using go fmt (if applicable)
• Updated documentation on the Paralus docs site (if applicable)
• Updated CHANGELOG.md

[codecov-commenter]

Codecov Report

Merging #200 (fe5b21d) into main (0e08492) will decrease coverage by 0.21%.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##             main     #200      +/-   ##
==========================================
- Coverage   34.62%   34.41%   -0.21%     
==========================================
  Files          74       74              
  Lines       11692    11692              
==========================================
- Hits         4048     4024      -24     
- Misses       7094     7123      +29     
+ Partials      550      545       -5     

see 1 file with indirect coverage changes

[akshay196]

Few minor changes to be consistent variable names in contribution guide.

Another change which is not in this PR's scope but I just noticed it: Let's remove elasticsearch step from the guide as it is not needed anymore: https://github.com/paralus/paralus/blob/5be0656351857b4e61ad82a39df9f4b7e2f5f7e5/CONTRIBUTING.md#elasticsearch

[niravparikh05]

Few minor changes to be consistent variable names in contribution guide.

Another change which is not in this PR's scope but I just noticed it: Let's remove elasticsearch step from the guide as it is not needed anymore: https://github.com/paralus/paralus/blob/5be0656351857b4e61ad82a39df9f4b7e2f5f7e5/CONTRIBUTING.md#elasticsearch

Good catch, have removed this now.