remove JaQu

remove STORE_LOCAL_TIME code

Don't try to find tools.jar on Java 9+

this has been unmaintained for a very long time, mostly because there is an active forked project based on this, so people should rather be using that

this has been hardcoded to false for quite some time now

Do not use deprecated Class.newInstance()

Fix NPE in Parser.parseMergeUsing()

clean up some javadoc and some throws clauses

Create UndoLog only when necessary and remove outdated code

Remove some PageStore+MVCC leftovers

Fix inconsistencies in checks for transaction isolation level

Fix issues with testing on latest Java versions

# Conflicts:
#	h2/src/main/org/h2/mvstore/tx/TxDecisionMaker.java

Leftovers handling