Add archivation for comparePillars func

Change-Id: I9e5a6e6163a1345e7144fefb8d4efe4a45c4184b
Related-Prod: PROD-28146 (PROD:28146)
diff --git a/src/com/mirantis/mk/Common.groovy b/src/com/mirantis/mk/Common.groovy
index 1cb3d6e..d0f3598 100644
--- a/src/com/mirantis/mk/Common.groovy
+++ b/src/com/mirantis/mk/Common.groovy
@@ -730,7 +730,9 @@
                     description += "<li><a href=\"${httpWS}/old/${item}/*view*/\">${item}</a></li>"
                 }
             }
-
+            def cwd = sh(script: 'basename $(pwd)', returnStdout: true).trim()
+            sh "tar -cf old_${cwd}.tar.gz old/ && rm -rf old/"
+            sh "tar -cf new_${cwd}.tar.gz new/ && rm -rf new/"
         }
     }