Remove remote-exec provisioners in Terraform script

Mounting of volumes is done in image build factory via fstab

ref: https://github.com/eesaanatluri/CRI_Cluster_Monitor/pull/42

ohpc-instance/main.tf

@@ -43,7 +43,7 @@ resource "openstack_compute_instance_v2" "ohpc" {
        owner: centos:centos
        path: /etc/hosts
        permissions: 0644
-     EOF
+    EOF
 
 # defines the networks of the instance
   network {