Fixing multi-stack log collection

Change-Id: Ie33848360eb72f3ca544d70b01999dd049caf8af
diff --git a/vars/stopComponentsLogs.groovy b/vars/stopComponentsLogs.groovy
index 24d2ad7..6729c37 100644
--- a/vars/stopComponentsLogs.groovy
+++ b/vars/stopComponentsLogs.groovy
@@ -25,8 +25,10 @@
     """
     if (cfg.compress) {
         sh """
+        pushd ${cfg.logsDir}
         tar czf ${cfg.logsDir}/combined.tgz *
         rm *.log
+        popd
         """
 
     }