Update notes for submitted changes

*     Initial checkin for contrail storage stats daemon     1. provisioning changes added     2. added unit tests     3. renamed/restructured SConscript files     4. restructured setup.py     5. added stats-daemon.conf     6. added test packages in SConscript     7. modified storage_nodemgr.py based on review comments     8. added latency changes in  storage-nodemgr.py     9. added diff logic for read/write bytes/counts for gui     10. Changed DEFAULT to DEFAULTS during provisioning