Renamed the admin program from "admin.py" to "vland-admin"

This will make packaging easier

Change-Id: I840aa8e73911bcb4b02903a0202178005e2c58b3
diff --git a/Changelog b/Changelog
index f147d6f..90efbc2 100644
--- a/Changelog
+++ b/Changelog
@@ -1,6 +1,8 @@
 vland 0.7
 
  * Added new driver to support the Mellanox SN2100 switch, using MLNX-OS
+ * Renamed the admin program from "admin.py" to "vland-admin" to make
+   packaging easier
  * Minor changes to the database code:
    + Automatic schema updates at vland startup
    + Add extra lock_reason field in the port table, and code to match