roles/common: Add SHA-2 MACs to CentOS 7 sshd_config

See: http://www.paramiko.org/changelog.html#1.16.0
See: #37

Signed-off-by: James Oguya <j.oguya@cgiar.org>

roles/common/templates/sshd_config_CentOS-7.j2

@@ -162,7 +162,7 @@ Subsystem	sftp	/usr/libexec/openssh/sftp-server
 # recommended ciphers, MACs and KEXAlgorithms from bettercrypto.org for OpenSSH 6.6
 # https://bettercrypto.org/static/applied-crypto-hardening.pdf
 Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes128-ctr
-MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-ripemd160
+MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-ripemd160-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-ripemd160
 KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1
 
 # CIS 6.2.14