Rename PHPUnit DB Server name from 'db' to 'db_phpunit' - this will force some adaption on CI PHPUnit-Tests

phpunit: fix phpunit.xml via ` vendor/bin/phpunit --migrate-configuration --configuration phpunit.xml`

B14754: Using double quotes in tableview config caused sql error. New check clears up the problem. refs #14754

S15579: Ability for searching all possible characters, includes not replaced QFQ variables. refs #15579

B15521: Changed equal operator for identical check. This way string needs to be empty and default given to trigger it. It corrects loading behaviour for select, radio and checkboxes.   refs #15521

B15521: Change handling of form variables from type select, radio and checkbox. Expected 0 from client request instead of empty string. refs #15521

B15521: Prevent using default for empty values which are given over POST (dynamic update). refs #15521

B15570: Changed DB handling in class FormAction. Fixed multi-db problem with this. Included change for check of existing form editor report. refs #15570

B15491: Escaped underscore character for user-friendly search. Counter fixed after last changes. refs #15491

B15483: Changed default from wget, preventing errors. Changed handling from protected folder check, new once a day. refs #15483

F14995: Final version of search db. Extended inline edit report functions (editing header and subheader). Report file can be edited too. New added documentation. New SQL function QMARK(). refs #14995