[EGD-5317] Module-db UT solved

Vfs init.
Convertion time string to unix time returns 1 hour later than should.
DatabaseInitializer stub that just creates empty dbs with table
structure but without data. Notification table initial records moved
to Database Initilize section. UT run with a stub of Database
Initialize - new test section introduced to test original
initializer: test-initializer.
Added missing data for contacts db to run the sorted list test
and test fix.

module-db/tests/ThreadsTable_tests.cpp

@@ -19,6 +19,7 @@
 
 TEST_CASE("Threads Table tests")
 {
+    vfs.Init();
     Database::initialize();
 
     const auto smsPath = purefs::dir::getUserDiskPath() / "sms.db";