Fix dumpAll test

Author: xxlabaza

client/src/test/java/io/appulse/epmd/java/client/LocalEpmdClientTest.java

@@ -144,10 +144,13 @@ public void dumpAll () {
     val nodes = client.dumpAll();
     assertThat(nodes)
         .isNotNull()
-        .hasSize(1)
-        .element(0).isNotNull();
+        .isNotEmpty();
+
+    val nodeDump = nodes.stream()
+        .filter(it -> it.getName().equals("dump"))
+        .findFirst()
+        .get();
 
-    val nodeDump = nodes.get(0);
     SoftAssertions.assertSoftly(softly -> {
       softly.assertThat(nodeDump.getName())
           .isEqualTo("dump");