Add logback config for eclair-node tests

[pm47]

Otherwise we use the default logback.xml file which writes to a
rolling file in the user directory.

NB: when enabling console logging, there are a lot of WARN outputs. Maybe something to look into @araspitzu?

10:37:33.657 WARN  ActorSystemImpl - withRequestTimeout was used in route however no request-timeout is set!
10:37:33.657 WARN  ActorSystemImpl - withRequestTimeoutResponse was used in route however no request-timeout is set!
10:37:33.683 WARN  ActorSystemImpl - withRequestTimeout was used in route however no request-timeout is set!
10:37:33.683 WARN  ActorSystemImpl - withRequestTimeoutResponse was used in route however no request-timeout is set!         

[araspitzu]

Yes that warning is suspicious, i'll look into it!

[codecov-io]

Codecov Report

Merging #1377 into master will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1377      +/-   ##
==========================================
+ Coverage   86.45%   86.51%   +0.05%     
==========================================
  Files         123      123              
  Lines        9357     9357              
  Branches      405      405              
==========================================
+ Hits         8090     8095       +5     
+ Misses       1267     1262       -5     

Impacted Files	Coverage Δ
.../eclair/payment/relay/PostRestartHtlcCleaner.scala	85.43% <0.00%> (-1.33%)	⬇️
...clair/payment/send/MultiPartPaymentLifecycle.scala	97.70% <0.00%> (-0.58%)	⬇️
...c/main/scala/fr/acinq/eclair/channel/Channel.scala	85.66% <0.00%> (+0.36%)	⬆️
...main/scala/fr/acinq/eclair/router/Validation.scala	92.51% <0.00%> (+1.57%)	⬆️

[araspitzu]

The reason is that when we test the ServiceSpec we use route.TestKit instead of starting an actual HTTP server, this is the correct choice but there is a known issue with timeouts and akka-http testing akka/akka-http#952

[pm47]

Fair enough, merging