Added .metadata to system tables

[alex268]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.00%. Comparing base (bec5d8a) to head (23fbaf5).

Files with missing lines	Patch %	Lines
...va/tech/ydb/jdbc/impl/YdbDatabaseMetaDataImpl.java	33.33%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #109      +/-   ##
============================================
- Coverage     80.01%   80.00%   -0.02%     
  Complexity     2194     2194              
============================================
  Files            66       66              
  Lines          5984     5985       +1     
  Branches        741      742       +1     
============================================
  Hits           4788     4788              
  Misses          869      869              
- Partials        327      328       +1     

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