touch install marker for algo

bubble-server/src/main/resources/ansible/roles/algo/templates/install_algo.sh.j2

@@ -13,6 +13,10 @@ cd ${ALGO_BASE}
 if [[ ! -f "${ALGO_BASE}/config.cfg.hbs" ]] ; then
   die "No ${ALGO_BASE}/config.cfg.hbs found"
 fi
+if [[ -f "${ALGO_BASE}/.install_marker" ]] ; then
+  echo "Algo already installed"
+  exit 0
+fi
 
 java -cp /home/bubble/api/bubble.jar bubble.main.BubbleMain generate-algo-conf --algo-config ${ALGO_BASE}/config.cfg.hbs || die "Error writing algo config.cfg"
 
@@ -38,3 +42,5 @@ python3 -m virtualenv --python="$(command -v python3)" .env \
 CONFIGS_BACKUP=/home/bubble/.BUBBLE_ALGO_CONFIGS.tgz
 cd ${ALGO_BASE} && tar czf ${CONFIGS_BACKUP} configs && chgrp bubble ${CONFIGS_BACKUP} && chmod 660 ${CONFIGS_BACKUP} || die "Error backing up algo configs"
 cd /home/bubble && tar xzf ${CONFIGS_BACKUP} && chgrp -R bubble configs && chown -R bubble configs && chmod 500 configs || die "Error unpacking algo configs to bubble home"
+
+touch "${ALGO_BASE}/.install_marker"