[NEMO-379] Change javadoc goal to a proper one

JIRA: [NEMO-379: Change javadoc goal to a proper one](https://issues.apache.org/jira/projects/NEMO/issues/NEMO-379)

**Major changes:**
- Change javadoc test command from `javadoc` to `test-javadoc`. This prevents tests from creating unwanted javdoc files, caused by apache#139 .

**Minor changes to note:**
- None

**Tests for the changes:**
- None

**Other comments:**
- None

Closes apache#212

hihi

common/src/main/java/org/apache/nemo/common/ir/edge/executionproperty/LambdaProperty.java

@@ -0,0 +1,4 @@
+package org.apache.nemo.common.ir.edge.executionproperty;
+
+public class LambdaProperty {
+}

compiler/optimizer/src/main/java/org/apache/nemo/compiler/optimizer/pass/compiletime/composite/LambdaPass.java

@@ -0,0 +1,4 @@
+package org.apache.nemo.compiler.optimizer.pass.compiletime.composite;
+
+public class LambdaPass {
+}

compiler/optimizer/src/main/java/org/apache/nemo/compiler/optimizer/policy/LambdaPolicy.java

@@ -0,0 +1,40 @@
+package org.apache.nemo.compiler.optimizer.policy;
+
+import org.apache.nemo.common.ir.IRDAG;
+import org.apache.nemo.compiler.optimizer.pass.compiletime.annotating.PipeTransferForAllEdgesPass;
+import org.apache.nemo.compiler.optimizer.pass.compiletime.composite.DefaultCompositePass;
+import org.apache.nemo.compiler.optimizer.pass.runtime.Message;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/*
+ * Lambda Policy
+ * Maintainer: Gao Zhiyuan
+ * Description: A part of lambda executor, to support Lambda pass.
+ */
+public final class LambdaPolicy implements Policy {
+  private final Policy policy;
+  private static final Logger LOG = LoggerFactory.getLogger(LambdaPolicy.class.getName());
+
+  /**
+   * Default constructor.
+   */
+  public LambdaPolicy() {
+    LOG.info("LambdaPolicy!!!!!");
+    final PolicyBuilder builder = new PolicyBuilder();
+    builder.registerCompileTimePass(new DefaultCompositePass());
+    builder.registerCompileTimePass(new PipeTransferForAllEdgesPass());
+    this.policy = builder.build();
+  }
+
+  @Override
+  public IRDAG runCompileTimeOptimization(final IRDAG dag, final String dagDirectory) {
+    return this.policy.runCompileTimeOptimization(dag, dagDirectory);
+  }
+
+  @Override
+  public IRDAG runRunTimeOptimizations(final IRDAG dag, final Message<?> message) {
+    return this.policy.runRunTimeOptimizations(dag, message);
+  }
+}