EX-4973 lipe: remove changelog user registration from config

EX-4973 lipe: remove changelog user registration from config

In stratagem-hp-config.sh, remove the changelog user registration
code. If no chnagelog user is configured then lamigo will register a
new named changelog user with the required mask.

Test-Parameters: trivial
Signed-off-by: John L. Hammond <jhammond@whamcloud.com>
Change-Id: I457f4539451e93bf7980fc7fb807f67e67abf247
Reviewed-on: https://review.whamcloud.com/47045
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Nathaniel Clark <nclark@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>