Get the BRG MAC address automatically

Sdnc db port was also adjusted as there's no sdnc-db
service anymore (since OOM-1651)

Change-Id: I154463224777f6fd76f5380253aa9130224fe3e4
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>
Issue-ID: INT-1365
diff --git a/docs/docs_vCPE.rst b/docs/docs_vCPE.rst
index ee830b5..a64a660 100644
--- a/docs/docs_vCPE.rst
+++ b/docs/docs_vCPE.rst
@@ -118,13 +118,13 @@
 
     vcpe.py infra
 
-11. From Rancher node run vcpe healthcheck command to check connectivity from sdnc to brg and gmux, and vpp configuration of brg and gmux. Write down BRG MAC address printed out at the last line
+11. From Rancher node run vcpe healthcheck command to check connectivity from sdnc to brg and gmux, and vpp configuration of brg and gmux.
 
 ::
 
     healthcheck-k8s.py --namespace <namespace name> --environment <env name>
 
-12. Instantiate vCPE customer service. Input the BRG MAC when prompt
+12. Instantiate vCPE customer service.
 
 ::