IN clause without parentheses is not working but work in Oracle DB

[skylark-nam]

Hi, Oracle expressions are possible. expression IN value1

ex) select 1 from dual where a in 1

[coveralls]

Coverage remained the same at 86.099% when pulling 193a80d on skylark-nam:master into ffbf96e on JSQLParser:master.

[wumpz]

I have two problems with this commit:

1. something like "in ( expr" would be accepted. If there is an opening parenthesis there must be a closing one. I know it is not yet done for all of JSqlParser, but it should.
2. The deparser should reconstruct exactly the same statement from the parse tree. But without any change, it would forget the parenthesis.

[manticore-projects]

Obsolete now, since I accidentally implemented this somewhere down the 4.7 Snapshot (reworking ExpressionList).
You can test it here.