reports: added to bar tooltip series value

Added to the bar tooltip the series value,
so that the user can view series values that
were truncated at the report legend at the
bar tooltip.

Change-Id: Ie2443770c2ee72f0887b7039abe5a0e703a4a88f
Bug-Url: https://bugzilla.redhat.com/1016353
Signed-off-by: Shirly Radco <sradco@redhat.com>