Shared pool among clients and fixed pool resources release#51

Merged

gkorland merged 6 commits intomasterfrom

Apr 7, 2020

Commits on Apr 5, 2020

[add] added option to create clients with shared pool. added option to releases the resources used by the pool ( single, and multihost )
filipecosta90
committed
[add] added Close() test on multi-host pool
filipecosta90
committed