Dont wait while delete-heat-stack-for-mcp-env processed

Change-Id: I6785d8385576f1751707a5b9e27903f575004aa8
diff --git a/test-drivetrain.groovy b/test-drivetrain.groovy
index fe7c87c..c421c17 100644
--- a/test-drivetrain.groovy
+++ b/test-drivetrain.groovy
@@ -119,11 +119,11 @@
             throw e
         } finally{
             if(DELETE_STACK.toBoolean() && ENVIRONMENT_IP == ""){
-                mcpEnvJob = build(job: "delete-heat-stack-for-mcp-env", parameters: [
+                mcpEnvJob = build(job: "delete-heat-stack-for-mcp-env", wait: false, parameters: [
                     [$class: 'StringParameterValue', name: 'OS_PROJECT_NAME', value: 'mcp-mk'],
                     [$class: 'StringParameterValue', name: 'STACK_NAME', value: 'jenkins-drivetrain-test-' + currentBuild.number],
                 ])
             }
         }
     }
-}
\ No newline at end of file
+}