travis: cargo test without --all

.travis.yml

@@ -36,7 +36,7 @@ before_script:
 
 script:
   # we set release as build type for all steps to benefit from already compiled packages in prior steps
-  # - BUILD_DUMMY_WASM_BINARY=1 cargo clippy --release -- -D warnings
-  - BUILD_DUMMY_WASM_BINARY=1 cargo test --release --all
+  - BUILD_DUMMY_WASM_BINARY=1 cargo clippy --release -- -D warnings
+  - BUILD_DUMMY_WASM_BINARY=1 cargo test --release
   - TRIGGER_WASM_BUILD=1 cargo build --release
   - ls -l ./target/release/wbuild/joystream-node-runtime/