Reparent 7-3 node jobs for zuul-v3

- Add 7-3 nodeset
 - Reparent legacy jobs to use this nodeset
 - Remove scenario005 test - was never used
 - Ensure hosts are added in order to subnodes file

Change-Id: I78c74cc54fc0c0d5b39a00ee35c95bbcfda8055e

playbooks/openstack-zuul-jobs/legacy/pre.yaml

@@ -28,6 +28,7 @@
       lineinfile:
         path: /etc/nodepool/sub_nodes_private
         line: "{{ hostvars[item]['nodepool']['private_ipv4'] }}"
+        insertafter: EOF
       with_items: "{{ groups['subnodes'] }}"
       when: groups['subnodes'] is defined
     - name: Create nodepool primary file

zuul.d/multinode-jobs.yaml

@@ -82,7 +82,6 @@
     name: tripleo-multinode-experimental
     experimental:
       jobs:
-        - tripleo-ci-centos-7-scenario005-multinode-oooq
         - tripleo-ci-centos-7-scenario006-multinode-oooq
         - tripleo-ci-centos-7-scenario010-multinode-oooq-container
         - tripleo-ci-centos-7-scenario011-multinode-oooq-container
@@ -96,12 +95,11 @@
 
 - job:
     name: tripleo-ci-centos-7-3nodes-multinode
-    parent: tripleo-ci-dsvm-multinode
-    run: playbooks/tripleo-ci/run.yaml
+    parent: tripleo-ci-base
     post-run: playbooks/tripleo-ci/post.yaml
     timeout: 10800
     voting: false
-    nodeset: legacy-centos-7-3-node
+    nodeset: three-centos-7-nodes
     branches: ^(?!stable/(newton|ocata|pike)).*$
     vars:
       toci_jobtype: multinode-2ctlr-featureset032
@@ -255,21 +253,6 @@
       nodes: 1ctlr
       featureset: 019
 
-- job:
-    name: tripleo-ci-centos-7-scenario005-multinode-oooq
-    parent: tripleo-ci-dsvm-multinode
-    run: playbooks/tripleo-ci/run.yaml
-    post-run: playbooks/tripleo-ci/post.yaml
-    timeout: 10800
-    nodeset: legacy-centos-7-4-node
-    voting: false
-    branches: ^(?!stable/newton).*$
-    vars:
-      toci_jobtype: multinode-1ctlr-featureset009
-      environment_type: multinode
-      nodes: 1ctlr
-      featureset: 009
-
 - job:
     name: tripleo-ci-centos-7-scenario006-multinode-oooq
     parent: tripleo-ci-base

zuul.d/nodesets.yaml

@@ -27,3 +27,25 @@
           - primary
       - name: peers
         nodes: []
+
+- nodeset:
+    name: three-centos-7-nodes
+    nodes:
+      - name: primary
+        label: centos-7
+      - name: secondary-1
+        label: centos-7
+      - name: secondary-2
+        label: centos-7
+    groups:
+      - name: switch
+        nodes:
+          - primary
+      - name: peers
+        nodes:
+          - secondary-1
+          - secondary-2
+      - name: subnodes
+        nodes:
+          - secondary-1
+          - secondary-2