Separated out integration tests

src/itest/docker-image/Dockerfile

@@ -0,0 +1,16 @@
+FROM sickp/alpine-sshd:7.5
+
+ADD id_rsa.pub /home/sshj/.ssh/authorized_keys
+
+ADD test-container/ssh_host_ecdsa_key     /etc/ssh/ssh_host_ecdsa_key
+ADD test-container/ssh_host_ecdsa_key.pub /etc/ssh/ssh_host_ecdsa_key.pub
+
+RUN \
+  echo "root:smile" | chpasswd && \
+  adduser -D -s /bin/ash sshj && \
+  passwd -u sshj && \
+  chmod 600 /home/sshj/.ssh/authorized_keys && \
+  chmod 600 /etc/ssh/ssh_host_ecdsa_key && \
+  chmod 644 /etc/ssh/ssh_host_ecdsa_key.pub && \
+  chown -R sshj:sshj /home/sshj
+

src/itest/docker-image/id_rsa.pub

@@ -0,0 +1 @@
+ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAoZ9l6Tkm2aL1tSBy2yw4xU5s8BE9MfqS/4J7DzvsYJxF6oQmTIjmStuhH/CT7UjuDtKXdXZUsIhKtafiizxGO8kHSzKDeitpth2RSr8ddMzZKyD6RNs7MfsgjA3UTtrrSrCXEY6O43S2cnuJrWzkPxtwxaQ3zOvDbS2tiulzyq0VzYmuhA/a4CyuQtJBuu+P2oqmu6pU/VB6IzONpvBvYbNPsH1WDmP7zko5wHPihXPCliztspKxS4DRtOZ7BGXyvg44UmIy0Kf4jOkaBV/eCCA4qH7ZHz71/5ceMOpszPcNOEmLGGYhwI+P3OuGMpkrSAv1f8IY6R8spZNncP6UaQ== no-passphrase

src/itest/docker-image/test-container/ssh_host_ecdsa_key

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIOpOBFjqe0hjK/hs4WZ3dZqnzanq1L3/JbvV1TCkbe4ToAoGCCqGSM49
+AwEHoUQDQgAEVzkrS7Yj0nXML7A3mE08YDthfBR/ZbyYJDIq1vTzcqs6KTaCT529
+swNXWLHO+mbHviZcRiI57ULXHZ1emom/Jw==
+-----END EC PRIVATE KEY-----

src/itest/docker-image/test-container/ssh_host_ecdsa_key.pub

@@ -0,0 +1 @@
+ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBFc5K0u2I9J1zC+wN5hNPGA7YXwUf2W8mCQyKtb083KrOik2gk+dvbMDV1ixzvpmx74mXEYiOe1C1x2dXpqJvyc= root@404b27be2bf4