Feat pkr tmpl proxy almalinux

Closes #130 (closed)

Make changes to proxy packer template so that it runs without any issues as we move the base OS from Centos to Almalinux

openstack-proxy/nodeimage.pkr.hcl

@@ -39,6 +39,7 @@ build {
   provisioner "shell" {
     inline = [
       "sudo yum install -y epel-release",
+      "sudo dnf config-manager --set-enabled crb",
       "sudo yum install -y libselinux-python3 python3 python3-pip tmux vim git bash-completion curl wget unzip",
       "sudo python3 -m pip install --upgrade pip",
       "sudo pip3 install s3cmd==2.3.0 ansible==4.10.0 python-openstackclient==5.8.0"