Add 'current-release' and 'previous-release' variables to JJB

Change-Id: If6cb2bfa6a7102413188ba81d87a7575f741271d
Related-Prod: PROD-34955
diff --git a/jobs/global.yaml b/jobs/global.yaml
index 800afa0..9a86ed2 100644
--- a/jobs/global.yaml
+++ b/jobs/global.yaml
@@ -4,3 +4,5 @@
       Do not edit this job through the web ! <br>
       Please use jenkins-job-builder in git <br>
       git clone ssh://gerrit.mcp.mirantis.com:29418/mcp/tcp-qa
+    current-version: 2019.2.10
+    previous-version: 2019.2.9
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