don't try starting couch on windows for now
don't try starting couch on windows for now

Apparently, it's too hard to set environment variable for membase
windows service, so we have to special-case windows in ns_bootstrap

Change-Id: Idd238fa81f0218248c27ce7716eccd006394d8db
Reviewed-on: http://review.membase.org/5100
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

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