-Upgrade from python-cryptography_2.6.1.bb to python-cryptography_2.7.bb.
-Upgrade from python3-cryptography_2.6.1.bb to python3-cryptography_2.7.bb.
Signed-off-by: Zang Ruochen <zangrc.fnst@cn.fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>