Allow OS-specific hacks with cluster_run
Allow OS-specific hacks with cluster_run

Change-Id: I1af406145b5dade29d364676a19f40c20b051989
Reviewed-on: http://review.couchbase.org/10455
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

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