HBASE-8653 master seems to be deleting region tmp directory from under compaction

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1487961 13f79535-47bb-0310-9956-ffa450edef68

hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java

@@ -838,7 +838,7 @@ public class HRegionFileSystem {
       throw new IOException("The specified region do not exists on disk: " + regionDir);
     }
 
-    if (readOnly) {
+    if (!readOnly) {
       // Cleanup temporary directories
       regionFs.cleanupTempDir();
       regionFs.cleanupSplitsDir();