Add ubuntu18

  * Info about Ubiquity https://wiki.ubuntu.com/UbiquityAutomation
    - we do exactly partitioning=> no possibility for now, to use
    new installer type.
  * Move growlvm.py to commons

Change-Id: Iabda3770b368a48919fef89d3a78cae388f60168
Prod-related: PROD-28155 (PROD:28155)
diff --git a/ubuntu-18.04/scripts/motd.sh b/ubuntu-18.04/scripts/motd.sh
new file mode 100644
index 0000000..08fb622
--- /dev/null
+++ b/ubuntu-18.04/scripts/motd.sh
@@ -0,0 +1,17 @@
+#!/bin/bash -xe
+# Motd
+apt-get -y install update-motd
+rm -vf /etc/update-motd.d/*
+echo "BUILD_TIMESTAMP=$(date '+%Y-%m-%d-%H-%M-%S' -u)" > /etc/image_version
+echo "BUILD_TIMESTAMP_RFC=\"$(date -u -R)\"" >> /etc/image_version
+cat << 'EOF' >> /etc/update-motd.d/00-header-mirantis
+#!/bin/sh
+#
+#    00-header - create the header of the MOTD
+#
+[ -r /etc/image_version ] && . /etc/image_version
+echo "Ubuntu 18.04 \"Bionic\" Mirantis cloud image"
+echo "Build date: ${BUILD_TIMESTAMP_RFC}"
+EOF
+chmod +x /etc/update-motd.d/00-header-mirantis
+