Merge "Install latest stable version of Juju"

diff --combined installers/full_install_osm.sh
index d6a0286,1e86fbd..7b45761
--- 1/installers/full_install_osm.sh
--- 2/installers/full_install_osm.sh
+++ b/installers/full_install_osm.sh
@@@ -631,7 -631,7 +631,7 @@@ function install_docker_compose() 
  
  function install_juju() {
      echo "Installing juju"
-     sudo snap install juju --classic --channel=2.5/stable
+     sudo snap install juju --classic
      [ -z "$INSTALL_NOLXD" ] && sudo dpkg-reconfigure -p medium lxd
      echo "Finished installation of juju"
      return 0
@@@ -646,10 -646,6 +646,10 @@@ function juju_createcontroller() 
  }
  
  function juju_createproxy() {
 +    echo -e "\nChecking required packages: iptables-persistent"
 +    dpkg -l iptables-persistent &>/dev/null || ! echo -e "    Not installed.\nInstalling iptables-persistent requires root privileges" || \
 +    sudo DEBIAN_FRONTEND=noninteractive apt-get -yq install iptables-persistent
 +
      if ! sudo iptables -t nat -C PREROUTING -p tcp -m tcp --dport 17070 -j DNAT --to-destination $OSM_VCA_HOST; then
          sudo iptables -t nat -A PREROUTING -p tcp -m tcp --dport 17070 -j DNAT --to-destination $OSM_VCA_HOST
          sudo netfilter-persistent save