reports: updated br7b legend

updated br7b legend so the text will stretch
with overflow.

Change-Id: I54f4c1005c6531afbd04c8592db7d5e43e2e0ab0
Bug-Url: https://bugzilla.redhat.com/1031757
Signed-off-by: Shirly Radco <sradco@redhat.com>