Remove object in wsgi LOG.info

Method start in Server class records log for wsgi server name, host
and port using its __dict__ which includes a socket object. i18n message
will deep copy each item's value in __dict__. In python2.6, deep copy
the socket object will raise "Exception RuntimeError" and can not be
caught. This makes manila-api run into a hang loop. This patch uses the
related properties instead of __dict__ object to fix the problem.

Change-Id: I7f099972fe7a79da35327e824ba71e5943f95d14
Closes-Bug: #1391432