[concept-expansion] Removed label requirement

Author: germanattanasio

examples/java/com/ibm/watson/developer_cloud/concept_expansion/v1/ConceptExpansionExample.java

@@ -23,9 +23,8 @@ public static void main(String[] args) {
     service.setUsernameAndPassword("<username>", "<password>");
 
     String[] seeds = new String[] {"nyc", "dc", "london", "big cities"};
-    String label = "demo";
 
-    Job job = service.createJob(label, seeds);
+    Job job = service.createJob(seeds);
 
     while (service.getJobStatus(job) == Job.Status.AWAITING_WORK
         || service.getJobStatus(job) == Job.Status.IN_FLIGHT) {

src/main/java/com/ibm/watson/developer_cloud/concept_expansion/v1/ConceptExpansion.java

@@ -67,6 +67,17 @@ public ConceptExpansion() {
     setDataset(Dataset.MT_SAMPLES);
   }
 
+  /**
+   * Creates a {@link Job}.
+   * 
+   * @param seeds List of terms to be used as seeds
+   * 
+   * @return the {@link Job}
+   */
+  public Job createJob(final String[] seeds) {
+    return createJob(null, seeds);
+  }
+
   /**
    * Creates a {@link Job}.
    * 
@@ -76,7 +87,6 @@ public ConceptExpansion() {
    * @return the {@link Job}
    */
   public Job createJob(final String label, final String[] seeds) {
-    Validate.notEmpty(label, "label cannot be null or empty");
     Validate.notEmpty(seeds, "seeds cannot be null or empty");
     Validate.notNull(dataset, "dataset cannot be null");