pathoGen: Support multiprocess on OS X

In OS X if we create the Couchbase object before forking, then
libevent fails (and python crashes) with the following error:

    [warn] kevent: Bad file descriptor

Fix this by deferring the connection until the child processes have
been created.

Change-Id: Ie0f21c815645959bb23865f0b514ec967977e56f
aws-ares: Update client hosts