Update gitlab-test.sh (#7883)

* Update gitlab-test.sh

https://github.com/paritytech/parity/issues/7871

* Update aura-test.sh

scripts/aura-test.sh

@@ -1,4 +1,7 @@
 #!/bin/bash
+set -e # fail on any error
+set -u # treat unset variables as error
+
 cargo build -j $(nproc) --release --features final $CARGOFLAGS
 git clone https://github.com/paritytech/parity-import-tests
 cp target/release/parity parity-import-tests/aura/parity

scripts/gitlab-test.sh

@@ -16,10 +16,10 @@ rust_test () {
   rustup show
   if [[ "${RUST_FILES_MODIFIED}" == "0" ]];
     then echo "Skipping Rust tests since no Rust files modified.";
-    else ./test.sh;
+    else ./test.sh || exit $?;
   fi
   if [[ "$CI_COMMIT_REF_NAME" == "nightly" ]];
-    then sh scripts/aura-test.sh;
+    then sh scripts/aura-test.sh || exit $?;
   fi
 }
 coverage_test () {