Fix FIPS job - nslookup_target

This patch sets a zuul variable "nslookup_target" to 'opendev.org'
to fix the FIPS jobs.

The nslookup_target var was added as a required var for the enable-fips
role in [1].

[1] https://opendev.org/zuul/zuul-jobs/commit/25caf7ef5e5801892ed575b063824ffb8355fb1e

Change-Id: Ifb0f929cf7cb9dddedcf4f0bd930b4bd7ca2dd72
diff --git a/.zuul.yaml b/.zuul.yaml
index 2195fa1..9f76f94 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -156,6 +156,8 @@
     description: |
       Telemetry devstack tempest tests job for a FIPS enabled Centos 8 stream system
     pre-run: playbooks/enable-fips.yaml
+    vars:
+      nslookup_target: 'opendev.org'
 
 - job:
     name: telemetry-dsvm-integration-centos-9s
@@ -170,6 +172,8 @@
     description: |
       Telemetry devstack tempest tests job for a FIPS enabled Centos 9 stream system
     pre-run: playbooks/enable-fips.yaml
+    vars:
+      nslookup_target: 'opendev.org'
 
 - project:
     templates: