TT#18774 Switch trunk/mr6.2+ NGCP to systemd

Systemd is the default init systemd for Debian jessie+,
we are ready to make it default for NGCP as well.

Change-Id: Iabac381fc97e0ad4d6925783c9fcc158253beb13

deployment.sh

@@ -86,7 +86,7 @@ VLAN_SIP_EXT=1719
 VLAN_SIP_INT=1720
 VLAN_HA_INT=1721
 VLAN_RTP_EXT=1722
-NGCP_INIT_SYSTEM="sysv"
+NGCP_INIT_SYSTEM="systemd"
 
 ### helper functions {{{
 get_deploy_status() {