I am trying to install OpenStack-Queens (packstack) in CentOS 7.2.1511. When i give

yum install openstack-packstack

it throws me this error.

Finished Dependency Resolutions Error: Package: python2-cryptography-2.1.4-1.e17.x86_64 (centos-openstack-queens) Requires: libcrypto.so.10(OPENSSL_1.0.2)(64bit)

Error: Package: 1: openstack-packstack-12.0.0-2.e17.noarch (centos-openstack-queens)

I tried installing(updating) OPENSSL package also. But still it throws me these errors. Help me to resolve this.