Pin neutron-tempest-plugin for ussuri/victoria jobs

As stable/victoria is in EM phase, and qa team also pinning
tempest 26.1.0 for stable/victoria
- https://review.opendev.org/c/openstack/devstack/+/843295

To have compatible neutron-tempest-plugin version with Tempest
26.1.0, we need to pin neutron-tempest-plugin 1.6.0 version. And
remove the vicrotia job from master gate.

Also same version we need to pin for stable/ussuri also as stable/ussuri
is also pinned with 26.1.0. in the ussuri
- https://review.opendev.org/c/openstack/devstack/+/838051

with 1.8.0, we are facing some incomaptbile code with Tempest 26.1.0
- https://zuul.opendev.org/t/openstack/build/c4d49a80620b44c7ba708e5afebd2b1c

Also, both EM branch facing below error (bug#1948804)
 sudo: guestmount: command not found
and applying the same fix from stable/train
- https://review.opendev.org/c/openstack/neutron-tempest-plugin/+/815518

Depends-On: https://review.opendev.org/c/openstack/devstack/+/838051
Depends-On: https://review.opendev.org/c/openstack/devstack/+/843295

Related-Bug: #1948804

Change-Id: I7d8c1b4cf5c483f1eb4411649c56d6cd8cd3bc66
diff --git a/zuul.d/ussuri_jobs.yaml b/zuul.d/ussuri_jobs.yaml
index 540ddfa..28fccc6 100644
--- a/zuul.d/ussuri_jobs.yaml
+++ b/zuul.d/ussuri_jobs.yaml
@@ -6,7 +6,7 @@
     required-projects: &required-projects-ussuri
       - openstack/neutron
       - name: openstack/neutron-tempest-plugin
-        override-checkout: 1.8.0
+        override-checkout: 1.6.0
       - openstack/tempest
     vars:
       devstack_services:
@@ -113,6 +113,12 @@
         Q_ML2_TENANT_NETWORK_TYPE: vxlan
         Q_ML2_PLUGIN_MECHANISM_DRIVERS: openvswitch
         ML2_L3_PLUGIN: router
+        # NOTE(bcafarel) guestmount binary not available on host OS
+        IMAGE_URLS: https://cloud-images.ubuntu.com/releases/bionic/release/ubuntu-18.04-server-cloudimg-amd64.img
+        ADVANCED_IMAGE_NAME: ubuntu-18.04-server-cloudimg-amd64
+        ADVANCED_INSTANCE_TYPE: ds512M
+        ADVANCED_INSTANCE_USER: ubuntu
+        CUSTOMIZE_IMAGE: false
       devstack_local_conf:
         post-config:
           # NOTE(slaweq): We can get rid of this hardcoded absolute path when
@@ -276,7 +282,7 @@
     required-projects:
       - openstack/neutron
       - name: openstack/neutron-tempest-plugin
-        override-checkout: 1.8.0
+        override-checkout: 1.6.0
       - openstack/tempest
       - openstack/designate-tempest-plugin
     vars:
@@ -313,7 +319,7 @@
       - openstack/neutron-fwaas
       - openstack/neutron
       - name: openstack/neutron-tempest-plugin
-        override-checkout: 1.8.0
+        override-checkout: 1.6.0
       - openstack/tempest
     vars:
       branch_override: stable/ussuri