[BUGFIX] Add translation overlay to related records

Change-Id: Ie756b394cf18036915de8f3301aaa7b084dabf90
Related: #56466
Reviewed-on: https://review.typo3.org/27972
Reviewed-by: Ingo Renner
Tested-by: Ingo Renner
phpDoc Whitespace tweak
Do not use makeInstance to create and throw and exception
whitespace tweak
[FEATURE] Introduce fields sortTitle and sortAuthor

Add the fields sortTitle and sortAuthor to make sorting easier.

Before you had to explicitly set up indexing configuration to fill
dynamic fields sortTitle_stringS and sortAuthor_stringS.
These are now replaced by no-dynamic fields and their values
are set automatically from the title and author fields through
copy fields.
Update schema version due to new fields sortTitle and sortAuthor
Update phpDoc
Choose Null as optional default instead of boolean false
Update phpDoc
Remove unused local variables
Choose Null as optional default instead of boolean false
Require Java 7 when installing Solr