Convert to openSUSE Leap 15.0 platform testing

Leap 15.0 has been released May 25th, 2018 (see
https://en.opensuse.org/Portal:15.0 ) and we'd like to
transition devstack against it and remove Leap 42.3 from
the testing matrix. Leap 15.0 is newer than Leap 42.3 as
the numbering schema of openSUSE was changed.

Co-Authored-By: Antonio Ojea <itsuugo@gmail.com>

Change-Id: I078f9a2580160c564c33e575008516f5e92239d6

.zuul.yaml

@@ -19,10 +19,10 @@
           - controller
 
 - nodeset:
-    name: devstack-single-node-opensuse-423
+    name: devstack-single-node-opensuse-150
     nodes:
       - name: controller
-        label: opensuse-423
+        label: opensuse-150
     groups:
       - name: tempest
         nodes:
@@ -395,10 +395,10 @@
     voting: false
 
 - job:
-    name: devstack-platform-opensuse-423
+    name: devstack-platform-opensuse-150
     parent: tempest-full
-    description: openSUSE 43.2 platform test
+    description: openSUSE 15.0 platform test
-    nodeset: devstack-single-node-opensuse-423
+    nodeset: devstack-single-node-opensuse-150
     voting: false
 
 - job:
@@ -487,7 +487,7 @@
       jobs:
         - devstack
         - devstack-platform-centos-7
-        - devstack-platform-opensuse-423
+        - devstack-platform-opensuse-150
         - devstack-platform-opensuse-tumbleweed
         - devstack-platform-fedora-latest
         - devstack-multinode

functions-common

@@ -374,8 +374,10 @@ function GetDistro {
     elif [[ "$os_VENDOR" =~ (openSUSE) ]]; then
         DISTRO="opensuse-$os_RELEASE"
         # Tumbleweed uses "n/a" as a codename, and the release is a datestring
-        # like 20180218, so not very useful.
+        # like 20180218, so not very useful. Leap however uses a release
-        [ "$os_CODENAME" = "n/a" ] && DISTRO="opensuse-tumbleweed"
+        # with a "dot", so for example 15.0
+        [ "$os_CODENAME" = "n/a" -a "$os_RELEASE" = "${os_RELEASE/\./}" ] && \
+            DISTRO="opensuse-tumbleweed"
     elif [[ "$os_VENDOR" =~ (SUSE LINUX) ]]; then
         # just use major release
         DISTRO="sle${os_RELEASE%.*}"
@@ -1376,7 +1378,7 @@ function zypper_install {
     [[ "$(id -u)" = "0" ]] && sudo="env"
     $sudo http_proxy="${http_proxy:-}" https_proxy="${https_proxy:-}" \
         no_proxy="${no_proxy:-}" \
-        zypper --non-interactive install --auto-agree-with-licenses "$@"
+        zypper --non-interactive install --auto-agree-with-licenses --no-recommends "$@"
 }
 
 function write_user_unit_file {

lib/databases/mysql

@@ -16,7 +16,7 @@ MYSQL_DRIVER=${MYSQL_DRIVER:-PyMySQL}
 register_database mysql
 
 MYSQL_SERVICE_NAME=mysql
-if is_fedora && ! is_oraclelinux; then
+if is_suse || is_fedora && ! is_oraclelinux; then
     MYSQL_SERVICE_NAME=mariadb
 fi
 

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|f27|f28|opensuse-42.3|opensuse-tumbleweed|rhel7) ]]; then
+if [[ ! ${DISTRO} =~ (xenial|artful|bionic|stretch|jessie|f27|f28|opensuse-42.3|opensuse-15.0|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"
@@ -1137,6 +1137,7 @@ if is_service_enabled neutron; then
     echo_summary "Configuring Neutron"
 
     configure_neutron
+
     # Run init_neutron only on the node hosting the Neutron API server
     if is_service_enabled $DATABASE_BACKENDS && is_service_enabled neutron; then
         init_neutron