[ISSUE #8940] Fix incorrect path for exportMetadataInRocksDBCommand

[RongtongJin]

Which Issue(s) This PR Fixes

Fixes #8940

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 47.54%. Comparing base (4574647) to head (be6919d).
Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
...command/export/ExportMetadataInRocksDBCommand.java	0.00%	4 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8941      +/-   ##
=============================================
- Coverage      47.64%   47.54%   -0.11%     
+ Complexity     11753    11734      -19     
=============================================
  Files           1304     1304              
  Lines          91058    91060       +2     
  Branches       11675    11676       +1     
=============================================
- Hits           43381    43290      -91     
- Misses         42345    42427      +82     
- Partials        5332     5343      +11     

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