Merge pull request #1 from trackabout/mk/upgradeNhibernate552 #6

Job	Run time
SqlServer2008-MicrosoftDataSqlClientDriver	8m 36s
SqlServer2008	8m 42s
PostgreSQL	6m 12s
Firebird	11m 47s
Firebird4	11m 18s
MySQL	12m 10s
Oracle	10m 13s
SQLite	5m 44s
	1h 14m 42s

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