N°3117 Refactor of datamodel and dictionnaries for the sake of modularity

- New module itop-bridge-cmdb-ticket to cope with the need to install only the CMDB or/and ticketing
	- New module itop-structure to hold declarations required by iTop independently from ITIL. Note that these declarations should ideally be moved to application/datamodel.application.xml or core/datamodel.core.xml. Anyhow, the compiler suffers a few limitations and it has been decided to create this module as a workaround.
	- Split of known-error module into itop-faq-light and itop-knownerror-light

datamodels/2.x/itop-knownerror-light/module.itop-knownerror-light.php

@@ -0,0 +1,43 @@
+<?php
+
+
+SetupWebPage::AddModule(
+	__FILE__, // Path to the current file, all other file names are relative to the directory containing this file
+	'itop-knownerror-light/2.8.0',
+	array(
+		// Identification
+		//
+		'label' => 'Known Errors Database',
+		'category' => 'business',
+
+		// Setup
+		//
+		'dependencies' => array(
+			'itop-config-mgmt/2.2.0',
+			'itop-portal/2.7.0',
+		),
+		'mandatory' => false,
+		'visible' => true,
+
+		// Components
+		//
+		'datamodel' => array(
+			'model.itop-knownerror-light.php',
+		),
+		'data.struct' => array(
+			//'data.struct.itop-knownerror-mgmt.xml',
+		),
+		'data.sample' => array(
+		),
+		
+		// Documentation
+		//
+		'doc.manual_setup' => '', // No manual installation instructions
+		'doc.more_information' => '',
+
+		// Default settings
+		//
+		'settings' => array(
+		),
+	)
+);