Create a named role.

    CLI Example:

    .. code-block:: bash

        salt '*' keystone.role_create admin

def role_create(name, profile=None, **connection_args):
    '''
    Create a named role.

    CLI Example:

    .. code-block:: bash

        salt '*' keystone.role_create admin
    '''

    kstone = auth(profile, **connection_args)
    if 'Error' not in role_get(name=name, profile=profile, **connection_args):
        return {'Error': 'Role "{0}" already exists'.format(name)}
    kstone.roles.create(name)
    return role_get(name=name, profile=profile, **connection_args)