tests: Run integration tests in parallel

Signed-off-by: Akira Moroo <retrage01@gmail.com>

Author: retrage

run_coreboot_integration_tests.sh

@@ -30,5 +30,5 @@ id -nGz "$USER" | grep -qzxF kvm || sudo adduser "$USER" kvm
 
 newgrp kvm << EOF
 export RUST_BACKTRACE=1
-cargo test --features "coreboot integration_tests"  -- --test-threads=1 test_boot
+cargo test --features "coreboot integration_tests"  -- test_boot
 EOF

run_integration_tests.sh

@@ -22,5 +22,5 @@ id -nGz "$USER" | grep -qzxF kvm || sudo adduser "$USER" kvm
 
 newgrp kvm << EOF
 export RUST_BACKTRACE=1
-cargo test --features "integration_tests"  -- --test-threads=1 test_boot
+cargo test --features "integration_tests"  -- test_boot
 EOF