FOR NEWLY ADDED VIRTUAL COLUMN

Analysis:
========
Field name comparison happens while filling the virtual columns
affected by foreign constraint. But field name is NULL in virtual
index for the newly added virtual column.

Fix:
===
Ignore the index if it has newly added virtual column. Foreign
key affected virtual column information is filled during
loading operation.

Reviewed-by: Jimmy Yang <jimmy.yang@oracle.com>
RB: 14895