HBASE-3098 TestMetaReaderEditor is broken in TRUNK; hangs; Add cleanup of old tests dir to HBaseClusterTestCase -- we are reading old zk data on occasion

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1006253 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/hadoop/hbase/HBaseClusterTestCase.java

@@ -97,6 +97,7 @@ public abstract class HBaseClusterTestCase extends HBaseTestCase {
    */
   protected void hBaseClusterSetup() throws Exception {
     File testDir = new File(getUnitTestdir(getName()).toString());
+    if (testDir.exists()) testDir.delete();
 
     // Note that this is done before we create the MiniHBaseCluster because we
     // need to edit the config to add the ZooKeeper servers.
@@ -106,7 +107,6 @@ public abstract class HBaseClusterTestCase extends HBaseTestCase {
     Configuration c = new Configuration(this.conf);
     // start the mini cluster
     this.cluster = new MiniHBaseCluster(c, regionServers);
-
     if (openMetaTable) {
       // opening the META table ensures that cluster is running
       new HTable(c, HConstants.META_TABLE_NAME);