[HUDI-91][HUDI-12]Migrate to spark 2.4.4, migrate to spark-avro library instead of databricks-avro, add support for Decimal/Date types

- Upgrade Spark to 2.4.4, Parquet to 1.10.1, Avro to 1.8.2
- Remove spark-avro from hudi-spark-bundle. Users need to provide --packages org.apache.spark:spark-avro:2.4.4 when running spark-shell or spark-submit
- Replace com.databricks:spark-avro with org.apache.spark:spark-avro
- Shade avro in hudi-hadoop-mr-bundle to make sure it does not conflict with hive's avro version.

hudi-hive/src/main/java/org/apache/hudi/hive/util/SchemaUtil.java

@@ -174,6 +174,8 @@ public class SchemaUtil {
         final DecimalMetadata decimalMetadata = parquetType.asPrimitiveType().getDecimalMetadata();
         return field.append("DECIMAL(").append(decimalMetadata.getPrecision()).append(" , ")
             .append(decimalMetadata.getScale()).append(")").toString();
+      } else if (originalType == OriginalType.DATE) {
+        return field.append("DATE").toString();
       }
       // TODO - fix the method naming here
       return parquetPrimitiveTypeName.convert(new PrimitiveType.PrimitiveTypeNameConverter<String, RuntimeException>() {