While upgrading from 3.5 to 3.6, engine-setup is failing with error "pki-enroll-openssh-cert.sh failed to execute"

Issue

• engine-setup is failing with below error.

[ ERROR ] Failed to execute stage 'Misc configuration': Command '/usr/share/ovirt-engine/bin/pki-enroll-openssh-cert.sh' failed to execute

• Below messages are shown in the setup logs.

2017-11-16 18:36:10 DEBUG otopi.plugins.ovirt_engine_setup.vmconsole_proxy_helper.pki plugin.execute:941 execute-output: ('/usr/share/ovirt-engine/bin/pki-enroll-openssh-cert.sh', '--name=vmconsole-proxy-user', '--id=vmconsole-proxy-user', '--principals=ovirt-vmconsole-proxy') stderr:
ssh-keygen: illegal option -- s
usage: ssh-keygen [options]
Options:
  -a trials   Number of trials for screening DH-GEX moduli.
  -B          Show bubblebabble digest of key file.
  -b bits     Number of bits in the key to create.
  -C comment  Provide new comment.
  -c          Change comment in private and public key files.
  -e          Convert OpenSSH to RFC 4716 key file.
  -F hostname Find hostname in known hosts file.
  -f filename Filename of the key file.
  -G file     Generate candidates for DH-GEX moduli.
  -g          Use generic DNS resource record format.
  -H          Hash names in known_hosts file.
  -i          Convert RFC 4716 to OpenSSH key file.
  -l          Show fingerprint of key file.
  -M memory   Amount of memory (MB) to use for generating DH-GEX moduli.
  -N phrase   Provide new passphrase.