ctdb-scripts: Event script indentation and whitespace cleanups

ctdb-scripts: Event script indentation and whitespace cleanups

* Re-indent case labels as per new script style

  Other indentation can be tweaked later as code changes, but the
  labels are an obvious bulk change.

* Minor whitespace fixes

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>