fix bug with iops setup

roles/main_infra/tasks/main.yml

@@ -16,6 +16,8 @@
   template:
     src: terraform.tfvars.j2
     dest: roles/main_infra/files/terraform.tfvars
+  vars:
+    db_iops: "{{ chain_db_iops | default({}) }}"
 
 - name: Generating backend file
   template:

roles/main_infra/templates/terraform.tfvars.j2

@@ -151,7 +151,7 @@ chain_db_storage_type = {
 }
 
 chain_db_iops = {
-{% for key, value in chain_db_iops.iteritems() %}
+{% for key, value in db_iops.iteritems() %}
 {{ key }} = "{{ value }}"{% if not loop.last %},{% endif %}
 {% endfor %}
 }