disabled mb_mnesia tests temporarily
disabled mb_mnesia tests temporarily

We need stuff merged and mb_mnesia uses path_config that's not working
yet from under tests.

Change-Id: I105e224ff11b7f0e23779d5e7b3135f785d9f34b
Reviewed-on: http://review.membase.org/5336
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

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