[JDBC] [pgjdbc/pgjdbc] 4ab5cc: feat: support fetching a REF_CURSOR usinggetObjec...

  Branch: refs/heads/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: 4ab5ccb7a299cfcec8a5b1cddf612d3f828fa157
      https://github.com/pgjdbc/pgjdbc/commit/4ab5ccb7a299cfcec8a5b1cddf612d3f828fa157
  Author: Philippe Marschall 
  Date:   2017-04-09 (Sun, 09 Apr 2017)

  Changed paths:
    M pgjdbc/src/main/java/org/postgresql/jdbc/PgCallableStatement.java
    A pgjdbc/src/test/java/org/postgresql/test/jdbc42/Jdbc42CallableStatementTest.java
    M pgjdbc/src/test/java/org/postgresql/test/jdbc42/Jdbc42TestSuite.java

  Log Message:
  -----------
  feat: support fetching a REF_CURSOR using getObject

Since DatabaseMetaData#supportsRefCursors now reports true
frameworks like Hibernate now use
callableStatement.getObject(int, ResultSet.class) to fetch the
REF_CURSOR.

Only support ResultSet.class as an argument to keep the patch simple.

Closes: #794