Add support for z/VM driver.

Add 'FCP' into connection_info in initialize_connection
in order to support IBM z/VM hypervisors. This change only
because z/VM need FCP(fibre channel port) info while other
platform don't need it. It will not have side effect
to other platforms since they can safely ignore it.

Change-Id: Ib2d72969608a84a7a200b96da3eefb3ccc13a096
Closes-Bug: #1323993
Use os.urandom in volume transfer

This patch replaces a call to random.random() with a call to
os.urandom(), which generates a higher quality random number.

Closes-Bug: #1319643

Change-Id: Ifaa2216d4905f5286884629beac52b25249d621f
Merge "Add support for z/VM driver."
Merge "Use os.urandom in volume transfer"