mdb-provider: Pass MdbHandle to the mdb_set_date_fmt() call
mdbtools >= 0.9.0 require a MdbHandle to be passed to the mdb_set_date_fmt() call. Move the call to directly after mdb_open() (when we first get the handle) and pass the handle to it. Note this change means that the mdb-provider will now no longer compile with older mdbtools versions. To enforce this the pkg-config check now checks for mdbtools >= 0.9 and the fallback to manual checking in /*/lib is removed, except for the case where the user has specified a path to check on the cmdline.