TemplateTool: In upgradeSite return also the Git revision that the BT will

be update to.

For example, in the past we had:
'Update erp5_core business template in state different'

And now it would be:
'Update erp5_core business template to revision: 2228e56df402a74645db28c4d121d84b51954dfc. In state different'

To help developer confirm that the upgrade will be done to the correct revision

product/ERP5/Tool/TemplateTool.py

@@ -63,6 +63,8 @@ from base64 import decodestring
 import subprocess
 import time
 
+from Products.ERP5VCS.WorkingCopy import getVcsTool
+
 WIN = os.name == 'nt'
 
 CATALOG_UPDATABLE = object()
@@ -1430,12 +1432,17 @@ class TemplateTool (BaseTool):
         template_list=dependency_list)
       update_bt5_list.sort(key=lambda x: dependency_list.index(x.title))
       for bt5 in update_bt5_list:
+        vcs_tool = getVcsTool(
+          vcs=None, path=bt5.repository, restricted=False
+        ).__of__(bt5)
         reinstall = bt5.title in deprecated_reinstall_set or bt5.force_install
         if (not(reinstall) and bt5.version_state == 'present') or \
             bt5.title in keep_bt5_id_set:
           continue
-        append("Update %s business template in state %s%s" % \
-          (bt5.title, bt5.version_state, (reinstall and ' (reinstall)') or ''))
+        append(
+          "Update %s business template to revision: %s. In state %s%s" % \
+          (bt5.title,  vcs_tool.getRevision(), bt5.version_state, (reinstall and ' (reinstall)') or '')
+        )
         if not(dry_run):
           bt5_url = "%s/%s" % (bt5.repository, bt5.title)
           self.updateBusinessTemplateFromUrl(bt5_url, reinstall=reinstall,