Introduce new property: bang_timestamp.

master/bt5/vifib_base/PropertySheetTemplateItem/portal_property_sheets/SoftwareInstance/bang_timestamp_property.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Standard Property" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>categories</string> </key>
+            <value>
+              <tuple>
+                <string>elementary_type/int</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>description</string> </key>
+            <value> <string>Used to inform client to update the instance.</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>bang_timestamp_property</string> </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>Standard Property</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

master/bt5/vifib_base/bt/revision

-468
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+469
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