Initial checkin for contrail storage stats daemon [review changes]
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

Change-Id: I696b3b485d54619f4590f74bdd4ccb10e325eb1c
Merge "Initial checkin for contrail storage stats daemon [review changes] 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"