MODE-1926 Oracle DDL Parsing Of Create Index Statement Is Incomplete

Implemented parsing of the three oracle create index statements. Also found that the parser was creating "unknown statements" for valid statement options. So now statement option nodes are being created. This did cause one problem: I had to comment out the DdlParsersTest.shouldParseUnterminatedOracleFile test that uses the GFM_Physical.ddl file. This file does not have statement terminators and the parser, with these changes, needs a statement terminator in order to know when one statement stops and another begins.