revert python ecmdDataBuffer::readFile() behavior
revert python ecmdDataBuffer::readFile() behavior

mklight/eCMD,mklight/eCMD,open-power/eCMD,mklight/eCMD,open-power/eCMD,mklight/eCMD,open-power/eCMD,open-power/eCMD,open-power/eCMD,mklight/eCMD