[Core CI] Make vsphere demo optional

PRODX-44798

Change-Id: Ia96dcc24ceb206900838430edbc7bf8d40497972
diff --git a/src/com/mirantis/mk/KaasUtils.groovy b/src/com/mirantis/mk/KaasUtils.groovy
index f410f06..72d42a2 100644
--- a/src/com/mirantis/mk/KaasUtils.groovy
+++ b/src/com/mirantis/mk/KaasUtils.groovy
@@ -128,7 +128,7 @@
     def equinixOnAwsDemo = env.EQUINIX_ON_AWS_DEMO ? env.EQUINIX_ON_AWS_DEMO.toBoolean() : false
     def azureOnAwsDemo = env.AZURE_ON_AWS_DEMO ? env.AZURE_ON_AWS_DEMO.toBoolean() : false
     def azureOnDemandDemo = env.ALLOW_AZURE_ON_DEMAND ? env.ALLOW_AZURE_ON_DEMAND.toBoolean() : false
-    def enableVsphereDemo = true
+    def enableVsphereDemo = env.ALLOW_VSPHERE_ON_DEMAND ? env.ALLOW_VSPHERE_ON_DEMAND.toBoolean() : false
     def enableOSDemo = true
     def enableBMDemo = true
     def enablebmCoreDemo = env.ALLOW_BM_CORE_ON_DEMAND ? env.ALLOW_BM_CORE_ON_DEMAND.toBoolean() : false