Small fixes for copy-logs.sh
Small fixes for copy-logs.sh

- Run diag commands in bash -c instead of using tee
  To try and make things a bit quieter and fix command not found
  errors.
- Only recover /var/tmp/packstack/latest, /var/tmp/packstack will
  contain a copy of the puppet modules and these take a long time
  to recover, zip and upload.
- Only recover /etc/httpd/conf.d, we don't really need the rest
- Send testrepository.subunit to the root of /logs for
  openstack health monitoring
- MySQL logs are really in /var/log/mariadb, not /var/log/mysql
- MySQL config is really in /etc/my.cnf.d, not /etc/mysql
- Also recover dstat.log for tracing resource consumption
- Use -L switch on cp to copy symlink'd contents
  (i.e /var/tmp/packstack/latest)
- Use -f switch on gzip for idempotency if/when run twice so that
  it overwrites existing logs and compresses the new logs.

Change-Id: Ia79f7dac5a33d2749e73b9a0940e33b94f2430f9

mahak/packstack,imcsk8/packstack,fr34k8/packstack,openstack/packstack,stackforge/packstack,mahak/packstack,stackforge/packstack,fr34k8/packstack,imcsk8/packstack,stackforge/packstack,openstack/packstack,fr34k8/packstack,mahak/packstack,imcsk8/packstack,openstack/packstack