Optimize NULL handling in MVSecondaryIndex.add()

Add Bits implementation for Java 9 and later versions

now that  Java7 has simplified generic construction syntax

Hardcoded port numbers should not be used in unit tests

Close JavaFileManager after use.

Previous name was incorrect.

Leftover shared lock after release

Locks left behind after commit

Reduce code duplication

Fix building of documentation and zip

Assorted changes

Better checks for arguments of partial LOB reading methods