[MODIF] Launching Manager in database test suite in simple mode (without
background threads).
[REFACTOR] Placed database content initialization into separate class to
allow multiple test suits use same data.
[ADD] Added new test suite for Manager class.
[ADD] Store data in setUp() method of Manager's test suite.
[MODIF] Time of created is ow embedded into constructors.
[ADD] Implemented unit-test to check WriterThread correctly storing
data.
[MODIF] Changed database name for different test suits.
[ADD] Added logs. While loop hangs for some reason.