CONFIGURATION-800 - Remove redundant initializer (#110)

diff --git a/src/test/java/org/apache/commons/configuration2/TestBaseConfiguration.java b/src/test/java/org/apache/commons/configuration2/TestBaseConfiguration.java
index 945c51e..69edee8 100644
--- a/src/test/java/org/apache/commons/configuration2/TestBaseConfiguration.java
+++ b/src/test/java/org/apache/commons/configuration2/TestBaseConfiguration.java
@@ -61,7 +61,7 @@
 
     protected static Class<?> missingElementException = NoSuchElementException.class;
     protected static Class<?> incompatibleElementException = ConversionException.class;
-    protected BaseConfiguration config = null;
+    protected BaseConfiguration config;
 
     @Before
     public void setUp() throws Exception
diff --git a/src/test/java/org/apache/commons/configuration2/TestDynamicCombinedConfiguration.java b/src/test/java/org/apache/commons/configuration2/TestDynamicCombinedConfiguration.java
index 3138461..af06c35 100644
--- a/src/test/java/org/apache/commons/configuration2/TestDynamicCombinedConfiguration.java
+++ b/src/test/java/org/apache/commons/configuration2/TestDynamicCombinedConfiguration.java
@@ -467,7 +467,7 @@
     private class ReaderThread extends Thread
     {
         private volatile boolean running = true;
-        private volatile boolean failed = false;
+        private volatile boolean failed;
         private final CombinedConfigurationBuilder builder;
         private final Random random;
 
diff --git a/src/test/java/org/apache/commons/configuration2/TestJNDIEnvironmentValues.java b/src/test/java/org/apache/commons/configuration2/TestJNDIEnvironmentValues.java
index 4a63bb7..0ecf0bb 100644
--- a/src/test/java/org/apache/commons/configuration2/TestJNDIEnvironmentValues.java
+++ b/src/test/java/org/apache/commons/configuration2/TestJNDIEnvironmentValues.java
@@ -31,7 +31,7 @@
 
 public class TestJNDIEnvironmentValues
 {
-    private JNDIConfiguration conf = null;
+    private JNDIConfiguration conf;
 
     @Before
     public void setUp() throws Exception
diff --git a/src/test/java/org/apache/commons/configuration2/TestNullJNDIEnvironmentValues.java b/src/test/java/org/apache/commons/configuration2/TestNullJNDIEnvironmentValues.java
index 6fa825a..fa896a3 100644
--- a/src/test/java/org/apache/commons/configuration2/TestNullJNDIEnvironmentValues.java
+++ b/src/test/java/org/apache/commons/configuration2/TestNullJNDIEnvironmentValues.java
@@ -30,7 +30,7 @@
 
 public class TestNullJNDIEnvironmentValues
 {
-    private JNDIConfiguration conf = null;
+    private JNDIConfiguration conf;
 
     @Before
     public void setUp() throws Exception
diff --git a/src/test/java/org/apache/commons/configuration2/test/HsqlDB.java b/src/test/java/org/apache/commons/configuration2/test/HsqlDB.java
index 6c8d3a4..f0e1b5b 100644
--- a/src/test/java/org/apache/commons/configuration2/test/HsqlDB.java
+++ b/src/test/java/org/apache/commons/configuration2/test/HsqlDB.java
@@ -34,7 +34,7 @@
 
 public class HsqlDB
 {
-    private Connection connection = null;
+    private Connection connection;
     private static final Log log = LogFactory.getLog(HsqlDB.class);
 
     public HsqlDB(final String uri, final String databaseDriver, final String loadFile)