Fix baremetal check for vm deployment

Change-Id: Iadcbd8a0910ab6586cd3e03de1c24655edf3293d
diff --git a/playbooks/main.yml b/playbooks/main.yml
index fce9928..fa12357 100644
--- a/playbooks/main.yml
+++ b/playbooks/main.yml
@@ -19,7 +19,7 @@
 
 - name: Create libvirt resources
   import_playbook: create-libvirt-resources.yml
-  when: not baremetal
+  when: baremetal|bool == false
 
 - name: Install and configure bifrost
   import_playbook: install-configure-bifrost.yml