Fix role credential cache file name
Fix role credential cache file name

If profile.Name is empty or "default" set the role credential cache file
name suffix to be more descriptive of the role we're assuming so we
avoid cache file name collisions when passing role ARNs to the command
instead of profile names.

mmmorris1975/aws-runas,mmmorris1975/go-aws-runas,mmmorris1975/aws-runas,mmmorris1975/aws-runas,mmmorris1975/aws-runas,mmmorris1975/aws-runas