TYPO3 Core

Steps to reproduce:

1. truncate table tx_extensionmanager_domain_model_extension
2. go to the extension manager
3. update extension list

Patch set 2 for branch master has been pushed to the review server.
It is available at https://review.typo3.org/19628

Patch set 3 for branch master has been pushed to the review server.
It is available at https://review.typo3.org/19628

Patch set 1 for branch TYPO3_6-0 has been pushed to the review server.
It is available at https://review.typo3.org/19629

This patch had to be reverted with https://review.typo3.org/#/c/19651/ and https://review.typo3.org/#/c/19654/

It triggered quite some side effects (especially in tests) that need to be resolved, before it could be merged again. After 2 hours of fixin, it still was not possible to get running tests on travis (which are not always reproducible in own environments, probably because of different error handling settings):

• The em utility classes should not implement SingletonIntefaces
• There are not mocked dependencies in some tests
• Some em classes are instantiated with makeInstance() instead of the objectManager, thus those classes can not get things injected and do things in __construct() instead. This is an issue especially with the singleton thing. This can not be solved easily, as parts of install tool and packages (gov, intro) rely on using makeInstance at some places
• Utilities need to be discoupled better (do not call repositories for example) and must be more stupid.
• Maybe some parts of the uitilities should be services instead that are better encapsulated?

Quite some refactorings need to be done here.