As per the link : https://hortonworks.com/blog/enabling-kerberos-hdp-active-directory-integration/
it suggest to install : krb5-auth-dialog
But this rpm is available only for centos 6. There is no rpm for centos 7.2. When installing centos 6 rpm on centos 7.2 , it errors out.
Is it mandatory to install krb5-auth-dialog ?
It has been removed from RHEL7/CentOS7 repos. You do not need it.
Please try without that package.