Use auth id instead of name for airship metal3-jenkins Github

Change-Id: I8f7342c63c18d9de05780455a211ed5ebd157696
diff --git a/jjb/airship/defaults.yml b/jjb/airship/defaults.yml
index 6e6a1e2..1d4a9ed 100644
--- a/jjb/airship/defaults.yml
+++ b/jjb/airship/defaults.yml
@@ -27,7 +27,7 @@
 - defaults:
     name: global
     job_prefix: 'airship'
-    ci_github_jenkins_credentials_id: 'nordixinfra-github'
+    ci_github_jenkins_credentials_id: 'a59788aa-737d-4d34-80d1-dfebb86fcbb8'
     ci_github_repo: 'Nordix/airship-dev-tools'
     ci_github_admin_user: 'nordixinfra'
     ci_github_whitelist_org: