tools: added rpm to hypervisors sosreport

Provides information about rpms installed on hypervisors.
(cherry picked from commit cd611d1555d206bf89ed78ea91d8145ea677fc4f)

Change-Id: I57bc036b3a13f44be14d194555a448f9005b9e78
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>