PHP-407: Default MongoBinData to type 0 and remove E_DEPRECATED notice

This removes using deprecated type 2 as the default, and also does away with the deprecation notice when the constructor's type argument was not specified (introduced by d9ed9c49f176e0c30eacaed002c8b1997464b9dc in 1.2.11).

The bug00407.phpt test is made redundant by changes to mongobindata-001.phpt and has been removed.