Allow ssh utils to use an absolute path
Allow ssh utils to use an absolute path

Currently, the ssh utils only accept a filename, and defaults to the
user's home directory + '.ssh'. The user should be allowed to put
the ssh key in whatever directory they choose.

Change-Id: I4a3068cbe765a16f6ba4b0c3e38410929ca3a14c
Needed-By: I7eaff91b3bc3b94ca97ffc7a1ace74c86117bd07

StackStorm/mistral,openstack/mistral,StackStorm/mistral,openstack/mistral