Fix #744: TestFile failure on Java 9 and Java 10

Fix suggested by Noel Grandin

More cleanups in LocalDateTimeUtils and other minor changes

Change REGEXP_REPLACE mode for MariaDB and PostgreSQL

Issue#646 NPE in CREATE VIEW WITH RECURSIVE & NON_RECURSIVE CTE

Copy javadoc to *BackwardsCompat to fix building of documentation

Add support of java.time.Instant V2

Instant values are mapped to TIMESTAMP data type.

Remove JPA/ORM configuration txt files as they're already integrated

Fix ==

Implement enquoteIdentifier() and isSimpleIdentifier() from JDBC 4.3

Grammar documentation change

Integer/Long.compare(x, y) can be used to compare primitive values

Grammar documentation: Extracting columnName from "Column Definition" for reuse in ALTER TABLE ALTER COLUMN.

Fixes in tests

Fix for issue #725: FilePathMem.tryLock() fails since Java 9

Use dummy FakeFileChannel as suggested by Noel Grandin to fix
memory and ZIP file systems.

Clean up LocalDateTimeUtils

Use StringBuilder instead of StringBuffer