Reorganize zuul jobs definitions

As we are adding jobs for each stable branch, we have more and more jobs
there and it was very hard to maintain all of that in one single file.
So this patch reorganize it and places definitons in "per stable branch"
files.

Change-Id: I0e7816f4057c90bce90bca68137c077580f9426a
diff --git a/zuul.d/base.yaml b/zuul.d/base.yaml
new file mode 100644
index 0000000..b6d9f90
--- /dev/null
+++ b/zuul.d/base.yaml
@@ -0,0 +1,108 @@
+- job:
+    name: neutron-tempest-plugin-base
+    parent: devstack-tempest
+    abstract: true
+    description: |
+      Perform setup common to all Neutron tempest tests
+    roles:
+      - zuul: openstack/devstack
+    required-projects:
+      - openstack/devstack-gate
+      - openstack/neutron
+      - openstack/neutron-tempest-plugin
+      - openstack/tempest
+    vars:
+      tempest_concurrency: 4
+      tox_envlist: all
+      devstack_localrc:
+        USE_PYTHON3: true
+        NETWORK_API_EXTENSIONS: "{{ (network_api_extensions_common + network_api_extensions_tempest) | join(',') }}"
+      devstack_plugins:
+        neutron: https://opendev.org/openstack/neutron.git
+        neutron-tempest-plugin: https://opendev.org/openstack/neutron-tempest-plugin.git
+      tempest_plugins:
+        - neutron-tempest-plugin
+      devstack_services:
+        tls-proxy: false
+        tempest: true
+        neutron-dns: true
+        neutron-qos: true
+        neutron-segments: true
+        neutron-trunk: true
+        neutron-uplink-status-propagation: true
+        neutron-network-segment-range: true
+        neutron-port-forwarding: true
+        neutron-conntrack-helper: true
+        neutron-tag-ports-during-bulk-creation: true
+      devstack_local_conf:
+        post-config:
+          $NEUTRON_CONF:
+            QUOTAS:
+              quota_router: 100
+              quota_floatingip: 500
+              quota_security_group: 150
+              quota_security_group_rule: 1000
+          # NOTE(slaweq): We can get rid of this hardcoded absolute path when
+          # devstack-tempest job will be switched to use lib/neutron instead of
+          # lib/neutron-legacy
+          /$NEUTRON_CORE_PLUGIN_CONF:
+            ml2:
+              type_drivers: flat,geneve,vlan,gre,local,vxlan
+            ml2_type_vlan:
+              network_vlan_ranges: foo:1:10
+            ml2_type_vxlan:
+              vni_ranges: 1:2000
+            ml2_type_gre:
+              tunnel_id_ranges: 1:1000
+          $NEUTRON_L3_CONF:
+            agent:
+              availability_zone: nova
+          $NEUTRON_DHCP_CONF:
+            agent:
+              availability_zone: nova
+          /etc/neutron/api-paste.ini:
+            composite:neutronapi_v2_0:
+              use: call:neutron.auth:pipeline_factory
+              noauth: cors request_id catch_errors osprofiler extensions neutronapiapp_v2_0
+              keystone: cors request_id catch_errors osprofiler authtoken keystonecontext extensions neutronapiapp_v2_0
+        test-config:
+          $TEMPEST_CONFIG:
+            neutron_plugin_options:
+              provider_vlans: foo,
+              agent_availability_zone: nova
+              image_is_advanced: true
+              available_type_drivers: flat,geneve,vlan,gre,local,vxlan
+              provider_net_base_segm_id: 1
+    irrelevant-files: &tempest-irrelevant-files
+      - ^(test-|)requirements.txt$
+      - ^releasenotes/.*$
+      - ^doc/.*$
+      - ^setup.cfg$
+      - ^.*\.rst$
+      - ^neutron/locale/.*$
+      - ^neutron/tests/unit/.*$
+      - ^tools/.*$
+      - ^tox.ini$
+
+- job:
+    name: neutron-tempest-plugin-scenario
+    parent: neutron-tempest-plugin-base
+    abstract: true
+    description: |
+      Perform setup common to all tempest scenario test jobs.
+    vars:
+      # NOTE(slaweq): in case of some tests, which requires advanced image,
+      # default test timeout set to 1200 seconds may be not enough if job is
+      # run on slow node
+      tempest_test_timeout: 2400
+      tempest_test_regex: ^neutron_tempest_plugin\.scenario
+      devstack_localrc:
+        PHYSICAL_NETWORK: default
+        IMAGE_URLS: https://cloud-images.ubuntu.com/releases/xenial/release/ubuntu-16.04-server-cloudimg-amd64-disk1.img
+        ADVANCED_IMAGE_NAME: ubuntu-16.04-server-cloudimg-amd64-disk1
+        ADVANCED_INSTANCE_TYPE: ds512M
+        ADVANCED_INSTANCE_USER: ubuntu
+        BUILD_TIMEOUT: 784
+      devstack_services:
+        cinder: true
+