feat(lcm-prometheus interconnection): allows lcm to modify prometheus config...

feat(lcm-prometheus interconnection): allows lcm to modify prometheus config in order to push new jobs like snmp metrics recollection

Change-Id: I8ea564f9d6ae96d6a5042e691ccaa0c758add158
Signed-off-by: bravof <fbravo@whitestack.com>
(cherry picked from commit 1e0297e9)