Cleanup /etc/hosts during node removal
Cleanup /etc/hosts during node removal

It seems that commit d8470559 dropped the cleanup of /etc/hosts when a
node is removed from the cluster. I don't know for sure, but it seems
accidental. As long as we add it to /etc/hosts, we should clean it up
too.

The patch also adds two FIXMEs since this kind of modifications should
be done via RPC calls to the master's node daemon, not directly.

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Guido Trotter <f62ca4d5358bdaeef0e50e57f9f7e231de63727e@google.com>

andir/ganeti,leshchevds/ganeti,mbakke/ganeti,ganeti/ganeti,grnet/snf-ganeti,yiannist/ganeti,dimara/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,yiannist/ganeti,onponomarev/ganeti,mbakke/ganeti,mbakke/ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,yiannist/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,leshchevds/ganeti,bitemyapp/ganeti,dimara/ganeti,ganeti/ganeti,apyrgio/snf-ganeti,andir/ganeti,leshchevds/ganeti,onponomarev/ganeti,grnet/snf-ganeti,andir/ganeti