Initial checkin for contrail storage stats daemon
    1. added unit tests
    2. renamed/restructured SConscript files
    3. restructured setup.py
    4. added stats-daemon.conf
    5. added test packages in SConscript
    6. modified storage_nodemgr.py based on review comments
    7. added latency changes
    8. added diff logic for read/write bytes/counts for gui
    9. storage package added in alphabetical order
    10. #common is removed from requirements.txt
    11. default values are #'d in stats-daemon.conf
    12. big functions are modified to sub function calls in nodemgr.py
    13. argument parsing in nodemgr.py is done using argparse
    14. more unit test cases added in test_storage_nodemgr.py
    15. indentation done in nodemgr.py
    16. storage node mgr name changed to storage stats mgr
    17. entry point added in setup.py
    18. removed stderr logging
    19. try-except removed in storage-nodemgr.py for importing
        sandesh files
    20. storage.sandesh disk name removed and uuid added similar
        to osd structure.
    21. added (tags="") empty tag in storage.sandesh

Change-Id: Iaa95fa5911e03019591104e9abc9febfba922141
Merge "    Initial checkin for contrail storage stats daemon     1. added unit tests     2. renamed/restructured SConscript files     3. restructured setup.py     4. added stats-daemon.conf     5. added test packages in SConscript     6. modified storage_nodemgr.py based on review comments     7. added latency changes     8. added diff logic for read/write bytes/counts for gui     9. storage package added in alphabetical order     10. #common is removed from requirements.txt     11. default values are #'d in stats-daemon.conf     12. big functions are modified to sub function calls in nodemgr.py     13. argument parsing in nodemgr.py is done using argparse     14. more unit test cases added in test_storage_nodemgr.py     15. indentation done in nodemgr.py     16. storage node mgr name changed to storage stats mgr     17. entry point added in setup.py     18. removed stderr logging     19. try-except removed in storage-nodemgr.py for importing         sandesh files     20. storage.sandesh disk name removed and uuid added similar         to osd structure.     21. added (tags="") empty tag in storage.sandesh" into R1.10