Add warning for local settings changes

lib/vmdb/settings.rb

@@ -27,6 +27,7 @@ def initialize(errors)
     def self.init
       ::Config.overwrite_arrays = true
       ::Config.merge_nil_values = false
+      warn_on_local_changes
       reset_settings_constant(for_resource(:my_server))
     end
 
@@ -180,6 +181,13 @@ def self.local_sources
     end
     private_class_method :local_sources
 
+    def self.warn_on_local_changes
+      local_sources.each do |path|
+        warn "\e[1;33m** WARN: Local changes are present in #{path}\e[0m" if File.size?(path)
+      end
+    end
+    private_class_method :warn_on_local_changes
+
     def self.replace_magic_values!(settings, resource)
       parent_settings = nil