Fixed to 'dsBase' to version v6.0.1-dev

Author: StuartWheater

azure-pipelines_site.pp

@@ -16,7 +16,7 @@
   remote_mysql   => false,        # There is not a remote mysql server
 
   dsbase_githubusername      => 'datashield',
-  dsbase_ref                 => 'master',
+  dsbase_ref                 => 'v6.0.1-dev',
   dsstats_githubusername     => 'datashield',
   dsstats_ref                => '',
   dsgraphics_githubusername  => 'datashield',