dtestcm: new test to measure dapl connection rates.

dtestcm: new test to measure dapl connection rates.

new test suite added to measure connection
rates of providers. Used to compare cma, scm,
and other providers under development.

dtestcm USAGE

s: server
c: connections (default = 1000)
b: burst rate of conn_reqs (default = 100)
m: multi-listens (set to burst setting )
v: verbose
w: wait on event (default, polling)
d: delay before accept
h: hostname/address of server, specified on client
P: provider name (default = OpenIB-v2-ib0)

Signed-off-by: Arlin Davis <arlin.r.davis@intel.com>