Create a failed case for a long index of a table entry.

Signed-off-by: Xiongfei Guo <xfguo@credosemi.com>
Fix mib group long index bug

Signed-off-by: leo-ma <begeekmyfriend@gmail.com>
Merge branch 'fix-long-idx'

Signed-off-by: Xiongfei Guo <xfguo@credosemi.com>