Debug output should write out column about extract2ddi

[alkondrashov]

This INFO message is generated in edu.cornell.ncrn.ced2ar.stata.StataReaderFactory which we reference. I'm not sure if there is a way to point a column in that separate pakage.

[alkondrashov]

Stata Data file test-file-data-types.dta is not a Format 115 is generated based on dtaHeader.getDtaFileFormat() property in DtaReader.java, rather on an individual column:

protected void isValidFormat() throws InvalidDtaFormatException {
	if( dtaHeader.getDtaFileFormat() != 113)
		throw new InvalidDtaFormatException("This reader can only read format 113" );
}