Avoid running tempest-ipv6-only for unrelated tools files

Currently tempest-ipv6-only job run on all the files change
present in /tools dir which is not required. For example
when we update the tempest plugin sanity scripts present in
/tools dir then this job run which is unneccessary.

Optimizing the tools dir file as per related job required to run.

Change-Id: Ia1d8a8a6dd22bec02e9f93598ddfd3d110b6c009
1 file changed