TT#56154 Add variable DEPLOYMENT_SH

This variable tells ngcp-installer that it is run from
deployment.sh.

In this case we need it to skip CE warning in ngcp-installer:
===================
This installation script is not intended to run in a shared system,
as it can add/delete/update existing configurations.
Please run this script only in a base install of 64 bit Debian 9 (stretch)
on a dedicated server.
Do you want to continue with the installation process? (y/N):
===================

Change-Id: I9a33ccbe07332a09a64c98a2bef844fa95498c05
(cherry picked from commit 6ee182161f)

templates/scripts/includes/deployment.sh

@@ -1723,6 +1723,7 @@ ORIGIN_INSTALL_DEV="${INSTALL_DEV}"
 FALLBACKFS_SIZE="${FALLBACKFS_SIZE}"
 ROOTFS_SIZE="${ROOTFS_SIZE}"
 SWAPFILE_SIZE_MB="${SWAPFILE_SIZE_MB}"
+DEPLOYMENT_SH=true
 EOF
 
   if "${TRUNK_VERSION}" && checkBootParam ngcpupload ; then