Enable integration test logging for better debug on CI failure

ci/test-stable.sh

@@ -28,11 +28,14 @@ for program in programs/native/*; do
 done
 
 # Run integration tests serially
+OLD_RUST_LOG=$RUST_LOG
 for test in tests/*.rs wallet/tests/*.rs drone/tests/*.rs; do
   test=${test##*/} # basename x
   test=${test%.rs} # basename x .rs
+  export RUST_LOG="$test"=trace
   _ cargo test --all --verbose --features="$FEATURES" --test="$test" -- --test-threads=1 --nocapture
 done
+RUST_LOG=$OLD_RUST_LOG
 
 echo --- ci/localnet-sanity.sh
 (