It is possible that .ssh folder may not be present at all, handle it

Change-Id: I6a730a32533ba65f384d896373d7dae9214fd930
Add support for env var OS_INSECURE to control secure auth with keystone

    To force secure auth, set 'export OS_INSECURE='
    To force insecure auth, set 'export OS_INSECURE=1'
    Currently, only insecure auth will work
    If secure auth is forced, certificate would need be provided, support for which
    will be added soon

Change-Id: I6760624ae13603312c54397fba431bfa4625fc16