Force new sandbox for maven exercises

Author: nygrenh

app/models/exercise_dir/java_maven.rb

@@ -26,5 +26,9 @@ def has_tests?
       File.exist?("#{@path}/src/test/java") &&
         !(Dir.entries("#{@path}/src/test/java") - ['.', '..', '.gitkeep', '.gitignore']).empty?
     end
+
+    def safe_for_experimental_sandbox
+      TmcProjectFile.for_project(@path).force_new_sandbox
+    end
   end
 end

app/models/tmc_project_file.rb

@@ -8,6 +8,7 @@ def initialize(data)
     return unless data.is_a?(Hash)
     @extra_student_files = data['extra_student_files'] if data['extra_student_files'].is_a?(Array)
     filter_extra_student_files!
+    @data = data
   end
 
   attr_reader :extra_student_files
@@ -19,6 +20,11 @@ def self.for_project(project_dir)
     empty
   end
 
+  def force_new_sandbox
+    return false if !@data
+    @data['force_new_sandbox']
+  end
+
   private
 
   def self.empty