Reencrypt encrypted data with a new master key.

    CLI example::

        salt myminion boto_kms.re_encrypt 'encrypted_data' 'alias/mynewkey' default '{"Statement":...}'

def re_encrypt(ciphertext_blob, destination_key_id,
               source_encryption_context=None,
               destination_encryption_context=None, grant_tokens=None,
               region=None, key=None, keyid=None, profile=None):
    '''
    Reencrypt encrypted data with a new master key.

    CLI example::

        salt myminion boto_kms.re_encrypt 'encrypted_data' 'alias/mynewkey' default '{"Statement":...}'
    '''
    conn = _get_conn(
        region=region,
        key=key,
        keyid=keyid,
        profile=profile
    )

    r = {}
    try:
        ciphertext = conn.re_encrypt(
            ciphertext_blob, destination_key_id, source_encryption_context,
            destination_encryption_context, grant_tokens
        )
        r['ciphertext'] = ciphertext
    except boto.exception.BotoServerError as e:
        r['error'] = __utils__['boto.get_error'](e)
    return r