Upgrade python-cryptography from 2.1.4 to 2.2.
here is the change in LICENSE file thats resulting in checksums changes
-from the same in CPython itself, and is licensed under the terms of the PSF
-License Agreement.
+from CPython, and is licensed under the terms of the PSF License Agreement.
Signed-off-by: Huang Qiyu <huangqy.fnst@cn.fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
