Pin version of LXD to latest LTS, juju 2.8.11 and microk8s 1.20

Change-Id: I31f5540e0d8991006e8b3767a94fe4126945cafb
Signed-off-by: David Garcia <david.garcia@canonical.com>

installers/charmed_install.sh

@@ -15,12 +15,12 @@
 
 # set -eux
 
-LXD_VERSION=4.17
+LXD_VERSION=4.0
 JUJU_VERSION=2.8
-JUJU_AGENT_VERSION=2.8.9
+JUJU_AGENT_VERSION=2.8.11
 K8S_CLOUD_NAME="k8s-cloud"
 KUBECTL="microk8s.kubectl"
-MICROK8S_VERSION=1.19
+MICROK8S_VERSION=1.20
 OSMCLIENT_VERSION=10.0
 IMAGES_OVERLAY_FILE=~/.osm/images-overlay.yaml
 PATH=/snap/bin:${PATH}

installers/full_install_osm.sh

@@ -1527,9 +1527,9 @@ function parse_docker_registry_url() {
     DOCKER_REGISTRY_URL=$(echo "$DOCKER_REGISTRY_URL" | awk '{split($1,a,"@"); print a[2]}')
 }
 
-LXD_VERSION=4.17
+LXD_VERSION=4.0
 JUJU_VERSION=2.8
-JUJU_AGENT_VERSION=2.8.6
+JUJU_AGENT_VERSION=2.8.11
 UNINSTALL=""
 DEVELOP=""
 UPDATE=""