replace multiple '| logger' in regenerate_ssh_host_keys with a single one

This is a speed improvement as previous would make a fork/subshell for
each pipe. This will only make a single fork.  I've also verified that
each line in logger output will still get the 'ec2' prefix

$ printf "%s\n%s\n" "hi world" "by world" | logger -s -t ec2 2>/dev/null
$ tail -n 2 /var/log/messages 
Sep 24 19:06:10 ip-10-242-225-190 ec2: hi world
Sep 24 19:06:10 ip-10-242-225-190 ec2: by world

The other thing to note is that I redirected stderr of the
regenerate_ssh_host_keys call to logger, so it will go to the logs also.

0 files changed, 0 insertions, 0 deletions