First fully functional version for ssh transfer

Make Error testing coherent to all sections
Add initial connectivity verification to remote host

Signed-off-by: Louis Bouchard <louis.bouchard@ubuntu.com>
Implement propagate to send ssh key file to remote server

Signed-off-by: Louis Bouchard <louis.bouchard@ubuntu.com>
Removed garbage definition

Signed-off-by: Louis Bouchard <louis.bouchard@ubuntu.com>
Add comments to default/kdump-tools to outline functionality

Signed-off-by: Louis Bouchard <louis.bouchard@ubuntu.com>
use ssh -i with explicit key location

On Ubuntu kdump-config runs as root with / as $HOME so it cannot
locate the .ssh directory. Tell the ssh commands where to find
it explicitely

Signed-off-by: Louis Bouchard <louis.bouchard@ubuntu.com>