adding comments for env variables

Author: vanajamukkara

integration-tests/src/test/java/oracle/kubernetes/operator/BaseTest.java

@@ -64,6 +64,8 @@ public static void initialize(String appPropsFile) throws Exception {
     // resultDir = resultRoot + "/acceptance_test_tmp";
     userProjectsDir = resultRoot + "/acceptance_test_tmp/user-projects";
     projectRoot = System.getProperty("user.dir") + "/..";
+    
+    //BRANCH_NAME var is used in Jenkins job
     if (System.getenv("BRANCH_NAME") != null) {
       branchName = System.getenv("BRANCH_NAME");
     } else {

integration-tests/src/test/java/oracle/kubernetes/operator/utils/Operator.java

@@ -279,6 +279,7 @@ private void initialize() throws Exception {
     }
 
     // customize the inputs yaml file to use our pre-built docker image
+    //IMAGE_NAME_OPERATOR & IMAGE_TAG_OPERATOR variables are used for wercker
     if (System.getenv("IMAGE_NAME_OPERATOR") != null
         && System.getenv("IMAGE_TAG_OPERATOR") != null) {
       operatorProps.put(