Make the core scripts executable

Change-Id: I83d6f7fa840ea7543fbf78ba9cce19724126a200
diff --git a/admin.py b/admin.py
old mode 100644
new mode 100755
diff --git a/db/setup_db.py b/db/setup_db.py
old mode 100644
new mode 100755
diff --git a/setup.py b/setup.py
old mode 100644
new mode 100755
diff --git a/vland.py b/vland.py
old mode 100644
new mode 100755