Added class to IntegrationTest Category (#336).

Author: gmessner

src/test/java/org/gitlab4j/api/TestAccessTokenUtils.java

@@ -12,6 +12,7 @@
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
+import org.junit.experimental.categories.Category;
 
 /**
  * In order for these tests to run you must set the following properties in test-gitlab4j.properties
@@ -22,6 +23,7 @@
  *
  * If any of the above are NULL, all tests in this class will be skipped.
  */
+@Category(IntegrationTest.class)
 public class TestAccessTokenUtils {
 
     // The following needs to be set to your test repository