Allow to regenerate the schema from the beginning by loading init schema

Changelog: added

scripts/regenerate-schema

@@ -32,6 +32,7 @@ class SchemaRegenerator
 
   def initialize(options)
     @rollback_testing = options.delete(:rollback_testing)
+    @init_schema_loading = options.delete(:init_schema_loading)
   end
 
   def execute
@@ -195,7 +196,7 @@ class SchemaRegenerator
   ##
   # Run rake task to setup the database.
   def setup_db
-    run_rake_task 'db:setup'
+    run_rake_task(@init_schema_loading ? 'db:create' : 'db:setup')
   end
 
   ##
@@ -293,6 +294,11 @@ if $PROGRAM_NAME == __FILE__
       options[:rollback_testing] = true
     end
 
+    opts.on("-i", "--init-schema-loading", String,
+      "Enable clean migrations starting from the beginning - loading init_structure.sql") do
+      options[:init_schema_loading] = true
+    end
+
     opts.on("-h", "--help", "Prints this help") do
       puts opts
       exit