Don't build credentials if user name is empty

Modified code to skip building credentials if user name
is empty, in addition to case where user name is null.

Change-Id: I5b53d4f97263df98cfe082f44a4e6af64b1e488b
Issue-ID: POLICY-868
Signed-off-by: Jim Hahn <jrh3@att.com>
diff --git a/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java b/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java
index 6b8b6f0..52ce13e 100644
--- a/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java
+++ b/controlloop/common/model-impl/rest/src/main/java/org/onap/policy/rest/RESTManager.java
@@ -146,7 +146,7 @@
     }
 
     private String makeAuthHeader(String username, String password) {
-        if (username == null) {
+        if (username == null || username.isEmpty()) {
             return null;
         }
 
diff --git a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java
index a2252a0..a830181 100755
--- a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java
+++ b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestGet.java
@@ -45,6 +45,16 @@
     }
 
     @Test
+    public void testUsernameEmpty() {
+        RESTManager mgr = new RESTManager();
+
+        Pair<Integer, String> result = mgr.get("http://www.example.org", "", null, null);
+        assertEquals((Integer)200, result.a);
+        assertTrue(result.b != null);
+        assertTrue(result.b.length() > 0);
+    }
+
+    @Test
     public void testUrlExampleOrg() {
         RESTManager mgr = new RESTManager();
 
diff --git a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPost.java b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPost.java
index de44dec..58ba5d2 100755
--- a/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPost.java
+++ b/controlloop/common/model-impl/rest/src/test/java/org/onap/policy/rest/TestPost.java
@@ -35,6 +35,13 @@
     }
 
     @Test
+    public void testUsernameEmpty() {
+        RESTManager mgr = new RESTManager();
+        Pair<Integer, String> result = mgr.post("http://www.example.org", "", null, null, null, null);
+        assertEquals(null, result);
+    }
+
+    @Test
     public void testBodyNull() {
         RESTManager mgr = new RESTManager();
         Pair<Integer, String> result = mgr.post("http://www.example.org", "user", null, null, null, null);