Add adj_impressions_humanized to readonly_fields.
Add adj_impressions_humanized to readonly_fields.

mozmar/snippets-service,mozmar/snippets-service,glogiotatidis/snippets-service,glogiotatidis/snippets-service,mozmar/snippets-service,mozmar/snippets-service,glogiotatidis/snippets-service,glogiotatidis/snippets-service