N°2435.1 Portal: Split portal composer.json in 2

- Autoloader for portal files in the itop-portal-base module
- Dependencies moved to root composer.json
- Add autoloader for /core and /application content

lib/symfony/twig-bundle/Resources/views/Exception/traces_text.html.twig

@@ -0,0 +1,30 @@
+<table class="trace trace-as-text">
+    <thead class="trace-head">
+        <tr>
+            <th class="sf-toggle" data-toggle-selector="#trace-text-{{ index }}" data-toggle-initial="{{ 1 == index ? 'display' }}">
+                <h3 class="trace-class">
+                    {% if num_exceptions > 1 %}
+                        <span class="text-muted">[{{ num_exceptions - index + 1 }}/{{ num_exceptions }}]</span>
+                    {% endif %}
+                    {{ exception.class|split('\\')|last }}
+                    <span class="icon icon-close">{{ include('@Twig/images/icon-minus-square-o.svg') }}</span>
+                    <span class="icon icon-open">{{ include('@Twig/images/icon-plus-square-o.svg') }}</span>
+                </h3>
+            </th>
+        </tr>
+    </thead>
+
+    <tbody id="trace-text-{{ index }}">
+        <tr>
+            <td>
+                {% if exception.trace|length %}
+                <pre class="stacktrace">
+                {%- apply escape('html') -%}
+                    {{- include('@Twig/Exception/traces.txt.twig', { exception: exception, format: 'html' }, with_context = false) }}
+                {% endapply %}
+                </pre>
+                {% endif %}
+            </td>
+        </tr>
+    </tbody>
+</table>