log stopping of vbm_sup childs
log stopping of vbm_sup childs

So that we can understand MB-5280 better.

Change-Id: Iac179b41fb04c0de3349edbd256f907703dacb9f
Reviewed-on: http://review.couchbase.org/16000
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

membase/ns_server,mschoch/ns_server,membase/ns_server,vzasade/ns_server,vzasade/ns_server,ceejatec/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,membase/ns_server,pavel-blagodov/ns_server,membase/ns_server,daverigby/ns_server,mschoch/ns_server,membase/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,membase/ns_server,t3rm1n4l/ns_server,daverigby/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,ceejatec/ns_server,ceejatec/ns_server,pavel-blagodov/ns_server,ceejatec/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,nimishzynga/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,nimishzynga/ns_server,daverigby/ns_server,nimishzynga/ns_server,mschoch/ns_server