Added webContextPath to quickstarts
#1965: Fixed so quickstarts include web context path properties.
#1965: Lets use better context path for the war quickstarts.
Fixes ENTESB-1695: HTTP Gateway leaks memory and file descriptors

Added a burn in test for the HTTP gateway and found it would OOM or run out of file descriptors.  We now close the vert.x http client once we are done with it so that those resources can get released.