Clean up code and add additional info message

lib/service_base_url_test_kit/service_base_url_validate_group.rb

@@ -172,12 +172,17 @@ def skip_message
           .map(&:address)
           .uniq
 
-        check_limit = get_endpoint_availability_limit(endpoint_availability_limit)
+        if endpoint_availability_limit.present? && endpoint_availability_limit.to_i < endpoint_list.count
+          info %(
+            Only the first #{endpoint_availability_limit.to_i} endpoints of #{endpoint_list.count} total will be
+            checked.
+          )
+        end
 
         endpoint_list.each_with_index do |address, index|
           assert_valid_http_uri(address)
 
-          next if check_limit.present? && index >= check_limit
+          next if endpoint_availability_limit.present? && endpoint_availability_limit.to_i <= index
 
           address = address.delete_suffix('/')
           get("#{address}/metadata", client: nil, headers: { Accept: 'application/fhir+json' })