This patch exposes a new config property named
http_read_timeout in the nsx_v3 group of nsx.ini
which allows users to configure a HTTP read timeout
separately from http connect timeout (set via http_timeout).
With this addition users can provide finer grained timeout
settings for their deployed env.
A unit test is also included.
backport: liberty
Change-Id: I6bcb142329e348c7b2224daf32bd3f648ff2af77
Closes-Bug: #1540462
1e1df3bdcb