Allow to define the number of test vms to be created

To test features that need several VMs to be created, enable
this setting that reuses the NODECOUNT setting already present
on the test script.

Change-Id: I43d1625f277b1c073441b70e47ba95e121dd116a

playbooks/roles/bifrost-create-vm-nodes/README.md

@@ -24,6 +24,10 @@ test_vm_memory_size: Tunable setting to allow a user to define a specific
                      between test runs, you may need to undefine the test
                      virtual machine(s) that were previously created.
 
+test_vm_num_nodes: Tunable setting to allow a user to define the number of
+                   test VMs that will be created. They will all be created
+                   with same settings.
+
 Dependencies
 ------------
 

playbooks/roles/bifrost-create-vm-nodes/defaults/main.yml

@@ -2,3 +2,4 @@
 # defaults file for bifrost-create-vm-nodes
 baremetal_csv_file: "/tmp/baremetal.csv"
 test_vm_memory_size: "3072"
+test_vm_num_nodes: "1"

playbooks/roles/bifrost-create-vm-nodes/tasks/main.yml

@@ -56,6 +56,7 @@
   environment:
     NODEOUTPUT: "{{baremetal_csv_file}}"
     VM_RAM: "{{ test_vm_memory_size }}"
+    NODECOUNT: "{{ test_vm_num_nodes }}"
   register: task_create_vm_nodes
   ignore_errors: yes
   delegate_to: localhost