PDB tests with H2 embedded

Try to reconnect at max 3x when connection is down in `AbstractDatabaseEngine#getPSIterator` #609

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Run time

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Job	Run time
Test H2 PDB Java 8	2m 41s
Test H2 PDB Java 11	2m 35s
Test H2 PDB Java 17	2m 23s
	7m 39s