Add ChainingRegExpFilter for prefix utilities

This patch adds ChainingRegExpFilter to filter commands prefixed to other
commands, such as 'nice' and 'ionice'. This filter only checks specified
number of arguments, and remaining arguments are filtered by the other
existing filters.

Change-Id: Ica014c472c7e1376f107a039452b215e5c2c4ee5
Implements: blueprint chaining-regexp-filter
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Merge "Add ChainingRegExpFilter for prefix utilities"