logging: expose logs when not mapped repo is found

rhodecode/apps/_base/__init__.py

@@ -275,6 +275,7 b' class RepoAppView(BaseAppView):'
 
         if self.rhodecode_vcs_repo is None:
             # unable to fetch this repo as vcs instance, report back to user
+            log.debug('Repository was not found on filesystem, check if it exists or is not damaged')
             h.flash(_(
                 "The repository `%(repo_name)s` cannot be loaded in filesystem. "
                 "Please check if it exist, or is not damaged.") %