ignore test and execute singularly

At the moment we cannot concurrently tests because the server will
conflict with each other, this make the test_electrum_raw test ignored
by default, and add a test in CI specifically for this test.

.github/workflows/rust.yml

@@ -45,9 +45,13 @@ jobs:
     - name: Tests (Bitcoin mode, REST+Electrum)
       run: RUST_LOG=debug cargo test
 
+    - name: Test test_electrum_raw
+      run: RUST_LOG=debug cargo test -- --include-ignored test_electrum_raw
+
     - name: Tests (Liquid mode, REST)
       run: RUST_LOG=debug cargo test --features liquid
 
+
   nix:
     runs-on: ubuntu-latest
     steps:

tests/electrum.rs

@@ -145,6 +145,7 @@ fn test_electrum() -> Result<()> {
 /// This only runs on Bitcoin (non-Liquid) mode.
 #[cfg_attr(not(feature = "liquid"), test)]
 #[cfg_attr(feature = "liquid", allow(dead_code))]
+#[ignore = "must be launched singularly, otherwise conflict with the other server"]
 fn test_electrum_raw() {
     // Spawn an Electrs Electrum RPC server
     let (_electrum_server, electrum_addr, mut _tester) = common::init_electrum_tester().unwrap();