Revert "Feature 11060: Remove POL and PLA modules from OSM helm chart"

This reverts commit 07367db6ef025e4fbb872b32a1f42737d2a563ec.

Change-Id: Ifa86312a16c4841603316f38ee5ffbdb4e6cc39f
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index fa200f0..622ff36 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -41,6 +41,9 @@
     echo -e "     -S <VCA secret> use VCA/juju secret key"
     echo -e "     -P <VCA pubkey> use VCA/juju public key file"
     echo -e "     -A <VCA apiproxy> use VCA/juju API proxy"
+    echo -e "     --pla:          install the PLA module for placement support"
+    echo -e "     --old-sa:       install old Service Assurance framework (MON, POL); do not install Airflow and Pushgateway"
+    echo -e "     --ng-sa:        install new Service Assurance framework (Airflow, AlertManager and Pushgateway) (enabled by default)"
     echo -e "     -o <COMPONENT>: ONLY installs the specified component (k8s_monitor, ng-sa, k8scluster, docker, deploy-osm)"
     echo -e "     -O <openrc file path/cloud name>: install OSM to an OpenStack infrastructure. <openrc file/cloud name> is required. If a <cloud name> is used, the clouds.yaml file should be under ~/.config/openstack/ or /etc/openstack/"
     echo -e "     -N <openstack public network name/ID>: public network name required to setup OSM to OpenStack"