Test: Apply PHP CS Fixer Rules to Sources

[matheuszych]

Aligned several Test component files with PHP-CS-Fixer output, including
spacing after the if keyword, a blank line after the file header in
class.ilTestProcessLockFileStorage.php, removal of redundant blank lines
between use imports, cleanup of constructor parameter lists, and
formatting of the interruptiveItem mapping in
PersonalSettingsTableDeleteAction.

/cc @thojou