Install python2-pyOpenSSL package on CentOS

Package pyOpenSSL is obsoleted by python2-pyOpenSSL.

Change-Id: I6a37d8e129f9492b97c61f1b44434496bb04428c
(cherry picked from commit 9149bfa)

bindep.txt

@@ -34,7 +34,7 @@ python-pyasn1               [platform:dpkg]
 python-openssl              [platform:dpkg]
 python-ndg-httpsclient      [platform:ubuntu !platform:ubuntu-trusty]
 python2-pyasn1              [platform:rpm]
-pyOpenSSL                   [platform:rpm]
+python2-pyOpenSSL           [platform:rpm]
 python-ndg_httpsclient      [platform:rpm]
 
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