Fix yet another regression introduced by 9e78b6918
Fix yet another regression introduced by 9e78b6918

Commit 9e78b6918 broke the exclusion of backends and frontends because
the names in Pandas data frame were sanitized by replacing '.' character
with '_' character, while the names set by user had '.' characters.

We fix this by replacing '.' characters on the backend and frontend names
set in exclusion list.

This regression is only applicable when backend and frontend names
contain '.' character.

unixsurfer/haproxystats,unixsurfer/haproxystats,unixsurfer/haproxystats