remove extra cert generation for etcd in reconcile
fix reconcile and etcd add and remove cluster state with rke remove
fix add/remove issues
Fix the up command
Fix default paths for kubeconfig and rkestate
This addresses users issues in being unable to use RKE command line
using SSH_AUTH_SOCK. On OSX the socket env var is set, but nothing
is listening. Also, Linux users have reported issues. To address this
the default mode is to not use SSH Agent Auth. A user must set it
explicitly in either the config file or on the CLI. The only way
to use a passphrase protected key file is with a properly configured
SSH Agent and using SSH Agent Auth.
