monitor vbucket_filter_change txn process earlier. MB-5285
monitor vbucket_filter_change txn process earlier. MB-5285

In MB-5285 we're seeing noproc from monitor which is useful, because
it tells us we've monitored late, but in general it's good idea to
monitor earlier so that death cause is seen and better propagated. In
MB-5285 that would be timeout instead of noproc which is clearer.

Change-Id: I7ee5d5779db445714653a67493f9d9b8dd0dc6e6
Reviewed-on: http://review.couchbase.org/15998
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

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