add Gentoo jobs and vars and also fix install test

Based them on fedora-latest jobs

Depends-On: https://review.openstack.org/604677
Depends-On: https://review.openstack.org/604688
Change-Id: I45622ac18685b809a091edba2df96fc8040138a8

tests/configure-mirrors.yaml

@@ -5,8 +5,12 @@
       mirror_fqdn: "{{ zuul_site_mirror_fqdn }}"
       set_apt_mirrors_trusted: True
   post_tasks:
+    - name: Set emacs package fact for gentoo
+      set_fact:
+        emacs_package: app-editors/emacs
+      when: ansible_distribution == 'Gentoo'
     - name: Install a package to sanity check the mirror configuration
       package:
-        name: "emacs"
+        name: "{{ emacs_package | default('emacs') }}"
         state: "present"
       become: yes

tests/multi-node-firewall-persistence.yaml

@@ -24,8 +24,8 @@
         - iptables --flush
         - ip6tables --flush
 
-    # NOTE (dmsimard): We're using with_items here because RedHat needs to
-    # restart both iptables and ip6tables.
+    # NOTE (dmsimard): We're using with_items here because RedHat and Gentoo
+    # need to restart both iptables and ip6tables.
     - name: Restart iptables
       become: yes
       service:

tests/multinode_firewall_persistence_vars/Gentoo.yaml

@@ -0,0 +1,3 @@
+iptables_service:
+  - iptables-restore
+  - ip6tables-restore

zuul.d/jobs.yaml

@@ -44,6 +44,11 @@
     parent: openstack-infra-base-integration
     nodeset: fedora-latest
 
+- job:
+    name: openstack-infra-base-integration-gentoo-17-0-systemd
+    parent: openstack-infra-base-integration
+    nodeset: gentoo-17-0-systemd
+
 - job:
     name: openstack-infra-base-integration-opensuse423
     parent: openstack-infra-base-integration
@@ -153,6 +158,23 @@
           nodes:
             - secondary
 
+- job:
+    name: openstack-infra-multinode-integration-gentoo-17-0-systemd
+    parent: openstack-infra-multinode-integration
+    nodeset:
+      nodes:
+        - name: primary
+          label: gentoo-17-0-systemd
+        - name: secondary
+          label: gentoo-17-0-systemd
+      groups:
+        - name: switch
+          nodes:
+            - primary
+        - name: peers
+          nodes:
+            - secondary
+
 - job:
     name: openstack-infra-multinode-integration-opensuse423
     parent: openstack-infra-multinode-integration

zuul.d/nodesets.yaml

@@ -17,6 +17,12 @@
       - name: fedora-28
         label: fedora-28
 
+- nodeset:
+    name: gentoo-17-0-systemd
+    nodes:
+      - name: gentoo-17-0-systemd
+        label: gentoo-17-0-systemd
+
 - nodeset:
     name: opensuse-423
     nodes:

zuul.d/project.yaml

@@ -7,6 +7,7 @@
         - openstack-infra-base-integration-centos-7
         - openstack-infra-base-integration-debian-stable
         - openstack-infra-base-integration-fedora-latest
+        - openstack-infra-base-integration-gentoo-17-0-systemd
         - openstack-infra-base-integration-ubuntu-bionic
         - openstack-infra-base-integration-ubuntu-trusty
         - openstack-infra-base-integration-ubuntu-xenial
@@ -16,6 +17,7 @@
         - openstack-infra-multinode-integration-centos-7
         - openstack-infra-multinode-integration-debian-stable
         - openstack-infra-multinode-integration-fedora-latest
+        - openstack-infra-multinode-integration-gentoo-17-0-systemd
         - openstack-infra-multinode-integration-ubuntu-bionic
         - openstack-infra-multinode-integration-ubuntu-trusty
         - openstack-infra-multinode-integration-ubuntu-xenial
@@ -28,6 +30,7 @@
         - openstack-infra-base-integration-centos-7
         - openstack-infra-base-integration-debian-stable
         - openstack-infra-base-integration-fedora-latest
+        - openstack-infra-base-integration-gentoo-17-0-systemd
         - openstack-infra-base-integration-ubuntu-bionic
         - openstack-infra-base-integration-ubuntu-trusty
         - openstack-infra-base-integration-ubuntu-xenial
@@ -35,6 +38,7 @@
         - openstack-infra-multinode-integration-centos-7
         - openstack-infra-multinode-integration-debian-stable
         - openstack-infra-multinode-integration-fedora-latest
+        - openstack-infra-multinode-integration-gentoo-17-0-systemd
         - openstack-infra-multinode-integration-ubuntu-bionic
         - openstack-infra-multinode-integration-ubuntu-trusty
         - openstack-infra-multinode-integration-ubuntu-xenial