Cleanup sql literal serialization code

[timowest]

Literal serialization code is now in the SQLTemplates code https://github.com/mysema/querydsl/blob/master/querydsl-sql/src/main/java/com/mysema/query/sql/SQLTemplates.java#L368

The code uses joda times directly and doesn't use the pluggable type handling of the Configuration class.

One solution could be provide a method like this in SQLTemplates

public String serialize(String literal, int jdbcType)

In addition to this the registered Type handlers will need to provide literal serialization as well

interface Type {
    // existing methods
    int[] getSQLTypes();
    Class<T> getReturnedClass();
    T getValue(ResultSet rs, int startIndex) throws SQLException;
    void setValue(PreparedStatement st, int startIndex, T value) throws SQLException;

    // new methods
    String getLiteral(T value) (default returns value.toString())
}

This is just a proposal, feel free to comment.

[timowest]

Released in 3.3.3