Fix H2 db table not found issue

[chashikajw]

Purpose

This will modify the H2 DB connection URL by adding 'DB_CLOSE_DELAY=-1' to fix the 'MB node table not found' issue

Fixes

• org.h2.jdbc.JdbcSQLSyntaxErrorException: Table "MB_EXCHANGE" not found when running the pack for a long time api-manager#2503 (comment)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.29%. Comparing base (cbefc8a) to head (ad087e2).
Report is 8 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13430      +/-   ##
============================================
+ Coverage     23.23%   24.29%   +1.06%     
- Complexity     1172     1239      +67     
============================================
  Files           254      254              
  Lines         11489    11489              
  Branches       1200     1200              
============================================
+ Hits           2669     2791     +122     
+ Misses         8794     8671     -123     
- Partials         26       27       +1     

Flag	Coverage Δ
integration_tests	24.29% <ø> (+1.06%)	⬆️

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