Make diameter_app_SUITE fail more usefully
Make diameter_app_SUITE fail more usefully

The badmatch in the grandparent commit is ssl not being installed:

=== Reason: no match of right hand side value {ssl,non_existing,
                                                    ["non_existing"]}
  in function  diameter_app_SUITE:app/1 (diameter_app_SUITE.erl, line 266)
  in call from diameter_app_SUITE:'-xref/1-fun-3-'/2 (diameter_app_SUITE.erl, line 214)
  in call from lists:'-filter/2-lc$^0/1-0-'/2 (lists.erl, line 1286)
  in call from diameter_app_SUITE:xref/1 (diameter_app_SUITE.erl, line 214)
  in call from test_server:ts_tc/3 (test_server.erl, line 1545)
  in call from test_server:run_test_case_eval1/6 (test_server.erl, line 1063)
  in call from test_server:run_test_case_eval/9 (test_server.erl, line 995)

Tweak the failure a bit more, without fixing it.

vladdu/otp,dgud/otp,vladdu/otp,legoscia/otp,saleyn/otp,isvilen/otp,potatosalad/otp,vinoski/otp,dgud/otp,rlipscombe/otp,erlang/otp,tuncer/otp,dumbbell/otp,emacsmirror/erlang,fenollp/otp,potatosalad/otp,bsmr-erlang/otp,cobusc/otp,mikpe/otp,kvakvs/otp,bjorng/otp,vladdu/otp,emacsmirror/erlang,erlang/otp,getong/otp,g-andrade/otp,g-andrade/otp,dumbbell/otp,jj1bdx/otp,bsmr-erlang/otp,mikpe/otp,aboroska/otp,emacsmirror/erlang,bsmr-erlang/otp,aboroska/otp,g-andrade/otp,bsmr-erlang/otp,RaimoNiskanen/otp,tuncer/otp,ferd/otp,RoadRunnr/otp,legoscia/otp,rlipscombe/otp,cobusc/otp,kvakvs/otp,RoadRunnr/otp,getong/otp,erlang/otp,dumbbell/otp,getong/otp,rlipscombe/otp,rlipscombe/otp,RaimoNiskanen/otp,electricimp/otp,fenollp/otp,tuncer/otp,vinoski/otp,aboroska/otp,saleyn/otp,emacsmirror/erlang,lrascao/otp,potatosalad/otp,RoadRunnr/otp,electricimp/otp,tuncer/otp,ferd/otp,cobusc/otp,bjorng/otp,fenollp/otp,isvilen/otp,aboroska/otp,aboroska/otp,bjorng/otp,fenollp/otp,aboroska/otp,dumbbell/otp,cobusc/otp,electricimp/otp,saleyn/otp,tuncer/otp,bsmr-erlang/otp,cobusc/otp,lrascao/otp,isvilen/otp,legoscia/otp,getong/otp,g-andrade/otp,saleyn/otp,electricimp/otp,bjorng/otp,vladdu/otp,dgud/otp,erlang/otp,vladdu/otp,uabboli/otp,kvakvs/otp,getong/otp,cobusc/otp,RoadRunnr/otp,getong/otp,jj1bdx/otp,kvakvs/otp,uabboli/otp,dgud/otp,potatosalad/otp,kvakvs/otp,vinoski/otp,RaimoNiskanen/otp,lrascao/otp,dgud/otp,emacsmirror/erlang,vinoski/otp,dgud/otp,potatosalad/otp,erlang/otp,legoscia/otp,mikpe/otp,RaimoNiskanen/otp,getong/otp,isvilen/otp,mikpe/otp,legoscia/otp,aboroska/otp,RoadRunnr/otp,jj1bdx/otp,dumbbell/otp,rlipscombe/otp,jj1bdx/otp,potatosalad/otp,electricimp/otp,emacsmirror/erlang,lrascao/otp,saleyn/otp,saleyn/otp,ferd/otp,isvilen/otp,uabboli/otp,saleyn/otp,getong/otp,dumbbell/otp,erlang/otp,jj1bdx/otp,bjorng/otp,erlang/otp,g-andrade/otp,lrascao/otp,dgud/otp,cobusc/otp,bjorng/otp,potatosalad/otp,legoscia/otp,kvakvs/otp,isvilen/otp,isvilen/otp,bjorng/otp,ferd/otp,erlang/otp,uabboli/otp,electricimp/otp,emacsmirror/erlang,isvilen/otp,uabboli/otp,saleyn/otp,g-andrade/otp,RaimoNiskanen/otp,g-andrade/otp,potatosalad/otp,fenollp/otp,dumbbell/otp,vinoski/otp,g-andrade/otp,ferd/otp,fenollp/otp,bsmr-erlang/otp,mikpe/otp,potatosalad/otp,RaimoNiskanen/otp,ferd/otp,jj1bdx/otp,fenollp/otp,kvakvs/otp,vladdu/otp,g-andrade/otp,dgud/otp,bjorng/otp,vladdu/otp,isvilen/otp,uabboli/otp,RoadRunnr/otp,rlipscombe/otp,ferd/otp,rlipscombe/otp,dgud/otp,uabboli/otp,lrascao/otp,vinoski/otp,kvakvs/otp,ferd/otp,RaimoNiskanen/otp,vinoski/otp,g-andrade/otp,RoadRunnr/otp,rlipscombe/otp,electricimp/otp,fenollp/otp,RoadRunnr/otp,erlang/otp,potatosalad/otp,uabboli/otp,jj1bdx/otp,RaimoNiskanen/otp,dumbbell/otp,mikpe/otp,bsmr-erlang/otp,isvilen/otp,aboroska/otp,jj1bdx/otp,dumbbell/otp,cobusc/otp,lrascao/otp,mikpe/otp,lrascao/otp,uabboli/otp,kvakvs/otp,jj1bdx/otp,electricimp/otp,vinoski/otp,mikpe/otp,jj1bdx/otp,legoscia/otp,emacsmirror/erlang,lrascao/otp,fenollp/otp,emacsmirror/erlang,rlipscombe/otp,saleyn/otp,ferd/otp,dumbbell/otp,aboroska/otp,vladdu/otp,bsmr-erlang/otp,erlang/otp,vinoski/otp,RaimoNiskanen/otp,mikpe/otp,tuncer/otp,vladdu/otp,rlipscombe/otp,getong/otp,legoscia/otp,bjorng/otp,mikpe/otp,tuncer/otp,bjorng/otp,dgud/otp,bsmr-erlang/otp,legoscia/otp,vinoski/otp,emacsmirror/erlang,tuncer/otp,getong/otp,tuncer/otp,electricimp/otp,RoadRunnr/otp