Update opensuse version

Nova has newer qemu requirements which needs opensuse 15.2 to meet. The
infra opensuse 15 images are 15.2 now to accomodate that. Update
opensuse's supported version to match.

Change-Id: I6f3c5234920b185b2b0cd9c358371402f7a7b922
(cherry picked from commit 471f1625bb)
(cherry picked from commit 0ebe7b072e)
(cherry picked from commit 0f351d2a4d)

lib/lvm

@@ -124,13 +124,15 @@ function init_lvm_volume_group {
     local vg=$1
     local size=$2
 
-    # Start the lvmetad and tgtd services
-    if is_fedora || is_suse; then
-        # services is not started by default
+    # Start the lvmetad service
+    if is_fedora ; then
+        # service is not started by default
         start_service lvm2-lvmetad
-        if [ "$CINDER_ISCSI_HELPER" = "tgtadm" ]; then
-            start_service tgtd
-        fi
+    fi
+
+    # Start the tgtd service on Fedora and SUSE if tgtadm is used
+    if  is_fedora || is_suse  && [[ "$CINDER_ISCSI_HELPER" = "tgtadm" ]]; then
+        start_service tgtd
     fi
 
     # Start with a clean volume group

stack.sh

@@ -221,7 +221,7 @@ write_devstack_version
 
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``FORCE=yes ./stack``
-if [[ ! ${DISTRO} =~ (xenial|artful|bionic|stretch|jessie|f28|f29|opensuse-15.0|opensuse-15.1|opensuse-tumbleweed|rhel7) ]]; then
+if [[ ! ${DISTRO} =~ (xenial|artful|bionic|stretch|jessie|f28|f29|opensuse-15.2|opensuse-tumbleweed|rhel7) ]]; then
     echo "WARNING: this script has not been tested on $DISTRO"
     if [[ "$FORCE" != "yes" ]]; then
         die $LINENO "If you wish to run this script anyway run with FORCE=yes"