Speed-up travis build

.travis.yml

@@ -35,7 +35,7 @@ install:
   - popd
 
 script:
-  - travis_wait 60 mvn -e test -P \!htmlUnit
+  - travis_wait 60 mvn -e test -P \!htmlUnit -Dteavm.junit.optimized=false -Dteavm.junit.js.runner=none
   - BASE_PATH=`pwd`
   - pushd tests/src/test/js
   - export DISPLAY=:99.0

tools/junit/src/main/java/org/teavm/junit/TeaVMTestRunner.java

@@ -124,6 +124,10 @@ public class TeaVMTestRunner extends Runner implements Filterable {
                 case "htmlunit":
                     runStrategy = new HtmlUnitRunStrategy();
                     break;
+                case "":
+                case "none":
+                    runStrategy = null;
+                    break;
                 default:
                     throw new InitializationError("Unknown run strategy: " + runStrategyName);
             }