Add support for SSH jump host configuration

[cristiroma]

Some servers could use jump hosts for access, in order to achieve this the SSH config file needs to be customized in the following manner:

Host jumphost
  HostName TEST_SSH_HOST_JUMPHOST
  User TEST_SSH_USER_JUMPHOST
  IdentityFile ~/.ssh/server.key
  StrictHostKeyChecking no

Host server
  HostName TEST_SSH_HOST
  User TEST_SSH_USER
  ProxyJump jumphost