TT#38454 Depends on 'lvm2' directly in ngcp-services-*

The package lvm2 has been installed on Debian debootstrap stage,
so far NGCP had no direct dependency on it. Adding it here.

Change-Id: I99d1711fb46211f5765c048a132f416740051a1b

debian/control

@@ -270,6 +270,7 @@ Depends:
  libpam-systemd,
  linux-headers-amd64,
  linux-image-amd64,
+ lvm2,
  mariadb-client,
  mariadb-server,
  monit,
@@ -362,6 +363,7 @@ Depends:
  libavcodec-extra,
  liblz4-tool,
  libpam-systemd,
+ lvm2,
  mariadb-client,
  mariadb-server,
  mytop | mariadb-client-10.1,
@@ -451,6 +453,7 @@ Depends:
  libpam-systemd,
  linux-headers-amd64,
  linux-image-amd64,
+ lvm2,
  mariadb-client,
  mariadb-server,
  monit,