[BUGFIX] Native DateTime values cannot be mapped from storage

DateTime values that are stored with an accordant (native) type
cannot be mapped correctly since a unix timestamp is expected.
The TCA configuration property 'dbType' for 'date' and
'datetime' fields reflects the non-timestamp way.

Change-Id: Ie694cf020a08ad91cc14982943b26705e5b128a9
Fixes: #46193
Releases: 6.0, 6.1
Reviewed-on: https://review.typo3.org/19450
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Steffen Ritter
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader
Revert "[TASK] Make current persistence replaceable"

This reverts commit 4d4b047e8eca2cfd86eef94954066f292277394f.

Conflicts:
	Classes/Persistence/Generic/PersistenceManager.php
	Tests/Unit/Persistence/RepositoryTest.php

Resolves: #46837
Releases: 6.1
Change-Id: I87914c6786d75ce217993cb6a70721b821bd0647
Reviewed-on: https://review.typo3.org/19488
Reviewed-by: Alexander Schnitzler
Tested-by: Alexander Schnitzler
[TASK] Update copyright year to 2013

Changes "(c) 2010-2012" to "(c) 2010-2013"

Releases: 6.1
Resolves: #46840
Change-Id: I0a26a9a05cfc5697eb536016aee946ad970d82b3
Reviewed-on: https://review.typo3.org/19494
Reviewed-by: Alexander Schnitzler
Tested-by: Alexander Schnitzler
[BUGFIX] Fix namespace in FileMountRepositoryTest

Currently a "Tests\Unit" is missing in between.

Resolves: #46845
Releases: 6.1
Change-Id: I2cb4f7fedf826ff35b66ecd4ea600bc60b41123b
Reviewed-on: https://review.typo3.org/19498
Reviewed-by: Wouter Wolters
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring