PHOENIX-5421 Phoenix QueryServer tests race condition on creating keytab folder

Closes #8

Signed-off-by: Josh Elser <elserj@apache.org>
diff --git a/queryserver/src/it/java/org/apache/phoenix/end2end/AbstractKerberisedTest.java b/queryserver/src/it/java/org/apache/phoenix/end2end/AbstractKerberisedTest.java
index 8ed7ce6..db2d9b6 100644
--- a/queryserver/src/it/java/org/apache/phoenix/end2end/AbstractKerberisedTest.java
+++ b/queryserver/src/it/java/org/apache/phoenix/end2end/AbstractKerberisedTest.java
@@ -44,6 +44,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
@@ -98,6 +99,7 @@
         sb.append(System.getProperty("user.dir")).append(File.separator);
         sb.append("target").append(File.separator);
         sb.append(AbstractKerberisedTest.class.getSimpleName());
+        sb.append("-").append(UUID.randomUUID());
         return sb.toString();
     }