Add endpoint URL to Solr URL

Author: gjs29

src/main/java/com/ibm/watson/developer_cloud/retrieve_and_rank/v1/RetrieveAndRank.java

@@ -321,7 +321,7 @@ public SolrClusterList getSolrClusters() {
    * @return URL to access Solr
    */
   public String getSolrUrl(String solrClusterId) {
-    return String.format(PATH_SOLR, solrClusterId);
+    return getEndPoint() + String.format(PATH_SOLR, solrClusterId);
   }
 
   /**

src/test/java/com/ibm/watson/developer_cloud/retrieve_and_rank/v1/RetrieveAndRankIntegrationTest.java

@@ -190,8 +190,8 @@ public void testGetSolrClusters() {
   @Test
   public void testGetSolrUrl() {
     final String solrUrl = service.getSolrUrl(clusterId);
-    final String expectedUrl = "/solr_clusters/" + clusterId + "/solr";
-    assertTrue(solrUrl.endsWith(expectedUrl));
+    final String expectedUrl = service.getEndPoint() + "/v1/solr_clusters/" + clusterId + "/solr";
+    assertEquals(expectedUrl, solrUrl);
   }
 
   @Test