Valgrind : Leak Check / DRD : UTransportTest possible leak / data race

[BishrutSubedi]

To repro locally:

bash lint/valgrind.sh build/Release/bin/UTransportTest

Tool: LEAK CHECK
------------------------
FAILURE DETECTED: ==157497== ERROR SUMMARY: 4 errors from 4 contexts (suppressed: 0 from 0)

Tool: DRD
------------------------
FAILURE DETECTED: ==157521== ERROR SUMMARY: 8 errors from 1 contexts (suppressed: 0 from 0)

==147861== LEAK SUMMARY:
==147861==    definitely lost: 0 bytes in 0 blocks
==147861==    indirectly lost: 0 bytes in 0 blocks
==147861==      possibly lost: 411 bytes in 13 blocks
==147861==    still reachable: 33,135 bytes in 423 blocks
==147861==         suppressed: 0 bytes in 0 blocks
==147861== 
==147861== For lists of detected and suppressed errors, rerun with: -s
==147861== ERROR SUMMARY: 4 errors from 4 contexts (suppressed: 0 from 0)