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 1e0297e98ab41e4bdc9537c1adffc2cae8b198cb)
diff --git a/installers/docker/osm_pods/lcm.yaml b/installers/docker/osm_pods/lcm.yaml
index 0801b82..6858f2a 100644
--- a/installers/docker/osm_pods/lcm.yaml
+++ b/installers/docker/osm_pods/lcm.yaml
@@ -50,7 +50,12 @@
         volumeMounts:
         - name: osm-packages
           mountPath: /app/storage
+        - name: prometheus-config
+          mountPath: /etc/prometheus
       volumes:
       - name: osm-packages
         hostPath:
          path: /var/lib/osm/osm_osm_packages/_data
+      - name: prometheus-config
+        hostPath:
+          path: /var/lib/osm/prometheus