fix bug while release users

Modify the user code and pass the test case

Feature/mpeer

make python test framework dynamically load module

close soket after FD is removed from fd set

with filename script pass

[TD-179]

fix make sequence for coverity_scan.

Feature/2.0tsdb

[TD-148] change ip sets

[TD-148] fix redirect message

add valgrind test support. current threshold is 23.

[TD-138]

[TD-148] add test scripts

[td-98] optimize put performance by comparing the minimum key of skip…

[td-98] optimize put performance by comparing the minimum key of skip list before starting to find the appropriated position in the list.

Feature/mpeer