[TASK] Refactor functional base test class

Extract setUp() and tearDown() code to an own class
and start documenting the whole sytem.

Resolves: #51144
Releases: 6.2

Change-Id: Id71e9f9111f62ee04e5f8ebcec121e5e01b958b3
Reviewed-on: https://review.typo3.org/23154
Reviewed-by: Tymoteusz Motylewski
Tested-by: Tymoteusz Motylewski
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
[BUGFIX] Query parameters of external link may get altered

If an external link is set to the same domain as the BE domain and
the id query parameter is present, any other query parameters will
be altered (and repeated).
Solution: href of external link should remain unaltered.

Resolves: #47844
Releases: 6.0, 6.1, 6.2
Change-Id: I79564ebf63ee4f92bfd3f95b17f72592ea849163
Reviewed-on: https://review.typo3.org/22682
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
[BUGFIX] Not possible to finish update wizard

When running the update wizard you are not able to finish it.
Therefore a back button is introduced when there is no
upgrade left.

Change-Id: Iaf66ced20e0dc0ec2870a559d6beee802011ae75
Resolves: #47735
Releases: 6.2
Reviewed-on: https://review.typo3.org/22679
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
[BUGFIX] TCA: subtypes_addlist not processed

TCA: subtypes_addlist is not processed
if the subtype_value_field is in a palette

Fixes: #30636
Releases: 6.2, 6.1, 6.0, 4.7, 4.5
Change-Id: I6bcaaf36c330962c1d7d9fdd4a73ae502e9710dc
Reviewed-on: https://review.typo3.org/9549
Reviewed-by: Wouter Wolters
Tested-by: Lucas Bremgartner
Reviewed-by: Ernesto Baschny
Tested-by: Ernesto Baschny
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
[CLEANUP] remove deprecated repository constructor

Resolves: #51142
Releases: 6.2
Change-Id: Iff5850940fa6e92ccd890564e2a90d11e9cf5e8d
Reviewed-on: https://review.typo3.org/23151
Reviewed-by: Oliver Klee
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
[TASK] Remove dispensable headlines in EXT: beuser

The amount of headline in backend user module can be reduced.
There is one headline for one view in Backend User Management.

Change-Id: If6b58b0ac2a09ecc9020714dba01448b6c159cb5
Resolves: #51147
Releases: 6.2
Reviewed-on: https://review.typo3.org/23163
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
[TASK] Add first functional tests for DataHandler

The patch introduces some common database fixtures that can be
re-used between tests. Two base functional tests in core
data handler are activated and another one in workspace.

Functional test xml is changed to execute all core and workspace
tests. Most of them are not working yet and marked as incomplete
for new.

Resolves: #51151
Releases: 6.2
Change-Id: Ic8e3da4f1064689e6ea7ef2365b0f8b1a3ce91f4
Reviewed-on: https://review.typo3.org/23171
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Tymoteusz Motylewski
Tested-by: Tymoteusz Motylewski
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
Revert "[CLEANUP] remove deprecated repository constructor"
This breaks a lot of tests as is. Will be reintroduced
together with the neccessary refactorings.

This reverts commit 91bb179484f45fdbdc5a20f938c31e982847b11e

Change-Id: Icb319d4bfce550758241714cd9d344a1038441bc
Reviewed-on: https://review.typo3.org/23173
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring