changing encodings to match with parquet-format

parquet-column/src/main/java/parquet/column/Encoding.java

diff --git a/parquet-column/src/main/java/parquet/column/Encoding.java b/parquet-column/src/main/java/parquet/column/Encoding.java
index 52e1592..3d4be6a 100644
--- a/parquet-column/src/main/java/parquet/column/Encoding.java
+++ b/parquet-column/src/main/java/parquet/column/Encoding.java
@@ -105,13 +105,6 @@
     }
   },
 
-  GROUP_VAR_INT {
-    @Override // TODO: GROUP VAR INT encoding
-    public ValuesReader getValuesReader(ColumnDescriptor descriptor, ValuesType valuesType) {
-      throw new UnsupportedOperationException("NYI");
-    }
-  },
-
   DELTA_BINARY_PACKED {
     @Override
     public ValuesReader getValuesReader(ColumnDescriptor descriptor, ValuesType valuesType) {
@@ -142,6 +135,10 @@
     }
   },
   
+  RLE_DICTIONARY {
+    
+  },
+  
   PLAIN_DICTIONARY {
     @Override
     public ValuesReader getDictionaryBasedValuesReader(ColumnDescriptor descriptor, ValuesType valuesType, Dictionary dictionary) {

parquet-column/src/test/java/parquet/column/values/deltastrings/benchmark/BenchmarkDeltaByteArray.java

diff --git a/parquet-column/src/test/java/parquet/column/values/deltastrings/benchmark/BenchmarkDeltaStrings.java b/parquet-column/src/test/java/parquet/column/values/deltastrings/benchmark/BenchmarkDeltaByteArray.java
similarity index 95%
rename from parquet-column/src/test/java/parquet/column/values/deltastrings/benchmark/BenchmarkDeltaStrings.java
rename to parquet-column/src/test/java/parquet/column/values/deltastrings/benchmark/BenchmarkDeltaByteArray.java
index 5a7b2ed..f2977ea 100644
--- a/parquet-column/src/test/java/parquet/column/values/deltastrings/benchmark/BenchmarkDeltaStrings.java
+++ b/parquet-column/src/test/java/parquet/column/values/deltastrings/benchmark/BenchmarkDeltaByteArray.java
@@ -22,8 +22,8 @@
 import org.junit.Test;
 
 import parquet.column.values.Utils;
-import parquet.column.values.deltastrings.DeltaStringValuesReader;
-import parquet.column.values.deltastrings.DeltaStringValuesWriter;
+import parquet.column.values.deltastrings.DeltaByteArrayReader;
+import parquet.column.values.deltastrings.DeltaByteArrayWriter;
 import parquet.column.values.plain.BinaryPlainValuesReader;
 import parquet.column.values.plain.PlainValuesWriter;
 import parquet.io.api.Binary;
@@ -35,7 +35,7 @@
 
 @AxisRange(min = 0, max = 1)
 @BenchmarkMethodChart(filePrefix = "benchmark-encoding-writing-random")
-public class BenchmarkDeltaStrings {
+public class BenchmarkDeltaByteArray {
   
   @Rule
   public org.junit.rules.TestRule benchmarkRun = new BenchmarkRule();