fix typo in lab-pipeline

Change-Id: I5177ef2215b30af8256a0840e6b24ffb8680cba7
diff --git a/lab-pipeline.groovy b/lab-pipeline.groovy
index b10d410..be0688e 100644
--- a/lab-pipeline.groovy
+++ b/lab-pipeline.groovy
@@ -47,7 +47,7 @@
     //
 
     stage ('Create infrastructure') {
-        IF (STACK_TYPE == 'heat') {
+        if (STACK_TYPE == 'heat') {
             // value defaults
             def openstackCloud
             def openstackVersion = OPENSTACK_API_CLIENT ? OPENSTACK_API_CLIENT : 'liberty'