add missing splunk hostname variable

playbooks/roles/jenkins_build/defaults/main.yml

@@ -285,6 +285,7 @@ build_jenkins_history_max_days: '15'
 build_jenkins_history_exclude_pattern: 'queue|nodeMonitors|UpdateCenter|global-build-stats|GhprbTrigger'
 
 # splunk
+build_jenkins_splunk_master_hostname: 'build.testeng.edx.org'
 build_jenkins_splunk_ignored_jobs: '(^((?!edx-(platform|e2e)).)*$)|.*private.*'
 build_jenkins_splunk_script_type: 'inline'
 build_jenkins_splunk_script_path: 'files/splunk.groovy'

playbooks/roles/jenkins_build/meta/main.yml

@@ -26,3 +26,4 @@ dependencies:
     jenkins_common_splunk_script_type: '{{ build_jenkins_splunk_script_type }}'
     jenkins_common_splunk_script_path: '{{ build_jenkins_splunk_script_path }}'
     jenkins_commmon_splunk_metadata: '{{ build_jenkins_splunk_metadata }}'
+    jenkins_common_splunk_master_hostname: '{{ build_jenkins_splunk_master_hostname }}'

playbooks/roles/jenkins_common/templates/config/splunk_config.yml.j2

@@ -9,7 +9,7 @@ MAX_EVENT_BATCH_SIZE: {{ jenkins_common_splunk_batch_size }}
 SPLUNK_APP_URL: '{{ JENKINS_SPLUNK_APP_URL }}'
 RETRIES_ON_ERROR: {{ jenkins_common_splunk_retries }}
 IGNORED_JOBS_PATTERN: {{ jenkins_common_splunk_ignored_jobs }}
-MASTER_HOSTNAME: '{{ jenkins_common_master_hostname }}'
+MASTER_HOSTNAME: '{{ jenkins_common_splunk_master_hostname }}'
 EVENT_SOURCE: '{{ jenkins_common_event_source }}'
 SCRIPT_TYPE: '{{ jenkins_common_splunk_script_type }}'
 SCRIPT_PATH: '{{ jenkins_common_splunk_script_path }}'