Fix non integration tests

With change #24, non integration can not run anymore.

(cherry picked from commit 76eecc8)

Author: dadoonet

src/test/java/org/elasticsearch/discovery/azure/AbstractAzureComputeServiceTest.java

@@ -20,12 +20,13 @@
 package org.elasticsearch.discovery.azure;
 
 import org.elasticsearch.action.admin.cluster.node.info.NodesInfoResponse;
-import org.elasticsearch.cloud.azure.AbstractAzureTest;
 import org.elasticsearch.cloud.azure.AzureComputeService;
 import org.elasticsearch.common.settings.ImmutableSettings;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.plugins.PluginsService;
+import org.elasticsearch.test.ElasticsearchIntegrationTest;
 
-public abstract class AbstractAzureComputeServiceTest extends AbstractAzureTest {
+public abstract class AbstractAzureComputeServiceTest extends ElasticsearchIntegrationTest {
 
     private Class<? extends AzureComputeService> mock;
 
@@ -34,6 +35,14 @@ public AbstractAzureComputeServiceTest(Class<? extends AzureComputeService> mock
         this.mock = mock;
     }
 
+    @Override
+    protected Settings nodeSettings(int nodeOrdinal) {
+        ImmutableSettings.Builder settings = ImmutableSettings.builder()
+                .put(super.nodeSettings(nodeOrdinal))
+                .put("plugins." + PluginsService.LOAD_PLUGIN_FROM_CLASSPATH, true);
+        return settings.build();
+    }
+
     protected void checkNumberOfNodes(int expected) {
         NodesInfoResponse nodeInfos = client().admin().cluster().prepareNodesInfo().execute().actionGet();
         assertNotNull(nodeInfos);