Updated changelog

to_date failed to parse inline text - E.g. the "T" and "Z" in
to_date('2017-04-21T00:00:00Z', 'YYYY-MM-DD"T"HH24:MI:SS"Z"')

Local.ENGLISH (if test system is not Local.ENGLISH).

(MySql/ORACLE - SQL style)

Command failed silently corrupting the changed column.
Before the change (added after v1.4.196) following was observed:
 alter table T modify C int null; -- Worked as expected
 alter table T modify C null;     -- Silently corrupted column C

fix reading enum values for MVStore. Case for read was missed in commit eb396945

begin the process of exploding the test script into smaller, more maintainable pieces

I don't like methods that do something completely different with a null parameter

I was using the putIfAbsent API wrong

just seen a ConcurrentModificationException on Jenkins.

It looks like we can access the Map<Integer, Chunk> from different threads concurrently without taking the same locks. So make it a ConcurrentHashMap. Nothing useful we can lock on here without introducing an ABBA deadlock.