Description of problem:
Some systems are not longer using ssh-dss by default, which results in some issues like:
Client side:
"[user@note git-test]$ git clone ssh://user@localhost:8001/repo
Cloning into 'repo'...
Unable to negotiate with 127.0.0.1: no matching host key type found. Their offer: ssh-dss
fatal: Could not read from remote repository."
Server side:
14:58:31,856 WARN [org.apache.sshd.server.session.ServerSession] (sshd-SshServer[847507d]-nio2-thread-2) Exception caught: java.lang.IllegalStateException: Unable to negotiate key exchange for server host key algorithms (client: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-rsa / server: ssh-dss)
at org.apache.sshd.common.session.AbstractSession.negotiate(AbstractSession.java:1109) [sshd-core-0.12.0.jar:0.12.0]
at org.apache.sshd.common.session.AbstractSession.doHandleMessage(AbstractSession.java:357) [sshd-core-0.12.0.jar:0.12.0]
at org.apache.sshd.common.session.AbstractSession.handleMessage(AbstractSession.java:295) [sshd-core-0.12.0.jar:0.12.0]