Fixes Bug 1436 - docker/tests/Dockerfile: cryptography dependencies

Change-Id: I1c3fad357012407285e5ada403916b829312cd97
Signed-off-by: João Fonseca <jpedrofonseca@av.it.pt>
(cherry picked from commit b3daa3a5aa897ea1f0708c520e325bfd682d2a12)
1 file changed