handle lack of thisNode in pool details nodes
handle lack of thisNode in pool details nodes

Somehow in the middle of cluster initialization or joining cluster I
managed to hit exception caused by lack of thisNode. We can just skip
such situation because next pool details update will very likely give
as working thisNode.

Change-Id: I4112c62973a99fc98d685ee85fb26a3d5fb49616
Reviewed-on: http://review.couchbase.org/9405
Reviewed-by: Benjamin Young <fe09bc2ef2737a3258f978e26226dcbac1b3f948@couchbase.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

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