SCHEMA-173. Improves CLI input of EntityIds and tests ToolUtils parsing of CLI input.

Signed-off-by: Lee Sheng <lsheng@wibidata.com>
SCHEMA-173. Removes makeId from TestToolUtils.

Signed-off-by: Lee Sheng <lsheng@wibidata.com>
KijiIOException : runtime exception wrapping IOException

 - HBaseKijiRowData constructor may throw IOException.
 - Scanner/Pager cannot throw IOException because Iterator does not allow it, thus requiring wrapping.