erp5_web_project_ui_test: fix test

bt5/erp5_web_project_ui_test/SkinTemplateItem/portal_skins/erp5_web_project_test/ERP5Site_createTestStartedProject.py

 portal = context.getPortalObject()
-project_reference = 'test-project'
+from datetime import datetime
+now = datetime.now()
+date_time = now.strftime("%m-%d-%Y-%H-%M-%S")
+test_id = "test-project-" + date_time
+project_reference = 'test-project-' + date_time
+page_reference = 'test-home-page-' + date_time
 
 module = portal.getDefaultModule('Project')
-project = module.newContent(portal_type = 'Project',
+project = module.newContent(id = test_id,
+                            portal_type = 'Project',
                             reference = project_reference)
 project.validate()
 
@@ -11,8 +17,9 @@ if home_page:
   system_preference.setPreferredPublicationSection("project_home_page_for_test")
   publication_section = context.restrictedTraverse('portal_categories/publication_section/project_home_page_for_test')
   module = portal.getDefaultModule('Web Page')
-  home_page = module.newContent(portal_type = 'Web Page',
-                                reference = project_reference + '-home.page',
+  home_page = module.newContent(id = test_id,
+                                portal_type = 'Web Page',
+                                reference = page_reference,
                                 publication_section_value = publication_section,
                                 follow_up_value = project)
   home_page.publishAlive()