[do_mysql] Set sql_auto_is_null and sql_mode

* Use same session variables as C driver.
* Session should use ANSI mode, which should also
  obviate the need for additional sanitization of
  quotation marks in previous commit 3cd69b3.

[#852 state:resolved]

Signed-off-by: Alex Coles <alex@alexcolesportfolio.com>

do_mysql/ext-java/src/main/java/do_mysql/MySqlDriverDefinition.java

@@ -61,6 +61,7 @@ public boolean supportsCalendarsInJDBCPreparedStatement() {
     public Properties getDefaultConnectionProperties() {
         Properties props = new Properties();
         props.put("useUnicode", "yes");
+        props.put("sessionVariables", "sql_auto_is_null=0,sql_mode='ANSI,NO_AUTO_VALUE_ON_ZERO,NO_DIR_IN_CREATE,NO_ENGINE_SUBSTITUTION,NO_UNSIGNED_SUBTRACTION,TRADITIONAL'");
         return props;
     }