* Renamed enum NULL_CONSTRAINT to NullConstraintType
* Replaced some switches with if-statement
* Check for Oracle-Mode when parsing Oracles-SQLs NOT NULL ENABLE
VALIDATE syntax. NOTE: 
* Added DbTypeEnum-class to Mode to have a String-free dbType check
featuring the method Database.isDbTypeOneOf(DbTypeEnum... dbTypes)

Oracles NOT NULL syntax can have optional ENABLE VALIDATE added e.g  
  create table T (C int NOT NULL ENABLE VALIDATE)
Some SQL-generators produce such SQL and H2 can now parse it with this
change.

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

Adding french translation in _messages_fr.prop 

MVStore can't read enums with values greater than 16

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

Issue#619 CTE have wrong column names when AS newname used with simpl…

small optimizations, backward compatibility with 1.7 

Replace TreeSet with PriorityQueue in MVSecondaryIndex re-build

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

issue#611 getMetaData().getColumnClassName() fails

List licenses independently

This allows automated tools to consume this metadata.

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

lastkey calulation on primary index reopening

Issue 580: NPE on store reopen

Close connection in test