[JDBC] [pgjdbc/pgjdbc] 201daf: fix: better parsing for returning keyword

  Branch: refs/heads/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: 201daf1dc916bbc35e2bbec961aebfd1b1e30bfc
      https://github.com/pgjdbc/pgjdbc/commit/201daf1dc916bbc35e2bbec961aebfd1b1e30bfc
  Author: Vladimir Sitnikov <sitnikov.vladimir@gmail.com>
  Date:   2017-07-04 (Tue, 04 Jul 2017)

  Changed paths:
    M pgjdbc/src/main/java/org/postgresql/core/Parser.java
    M pgjdbc/src/test/java/org/postgresql/core/ParserTest.java
    A pgjdbc/src/test/java/org/postgresql/core/ReturningParserTest.java
    M pgjdbc/src/test/java/org/postgresql/test/jdbc2/Jdbc2TestSuite.java
    M pgjdbc/src/test/java/org/postgresql/test/jdbc2/QuotationTest.java

  Log Message:
  -----------
  fix: better parsing for returning keyword

Note: things like  insert into ... select 1 returning from ... are still considered as "having returning keyword"

fixes #824