Fix memcached user on Debian/Ubuntu based distro

Change-Id: Ib99ca16e8633ddd630699956014d47fc72c2cd0d
Closes-Bug: #1498238

docker/memcached/config-external.sh

@@ -3,6 +3,13 @@ SOURCE="/opt/kolla/memcached/memcached.conf"
 TARGET="/etc/memcached.conf"
 OWNER="memcached"
 
+if [[ "${KOLLA_BASE_DISTRO}" == "ubuntu" || \
+        "${KOLLA_BASE_DISTRO}" == "debian" ]]; then
+    OWNER="memcache"
+else
+    OWNER="memcached"
+fi
+
 if [[ -f "$SOURCE" ]]; then
     cp $SOURCE $TARGET
     chown ${OWNER}: $TARGET

docker/memcached/start.sh

@@ -2,8 +2,14 @@
 
 set -o errexit
 
-CMD="/usr/bin/memcached"
-ARGS="-u memcached -vv"
+if [[ "${KOLLA_BASE_DISTRO}" == "ubuntu" || \
+        "${KOLLA_BASE_DISTRO}" == "debian" ]]; then
+    CMD="/usr/bin/memcached"
+    ARGS="-u memcache -vv"
+else
+    CMD="/usr/bin/memcached"
+    ARGS="-u memcached -vv"
+fi
 
 # Loading common functions.
 source /opt/kolla/kolla-common.sh