Moving depedencies off cdh to apache + Hive2 support

- Tests redone in the process
 - Main changes are to RealtimeRecordReader and how it treats maps/arrays
 - Make hive sync work with Hive 1/2 and CDH environments
 - Fixes to make corner cases for Hive queries
 - Spark Hive integration - Working version across Apache and CDH versions
 - Known Issue - https://github.com/uber/hudi/issues/439

hoodie-spark/src/main/java/com/uber/hoodie/DataSourceUtils.java

@@ -32,6 +32,8 @@ import com.uber.hoodie.index.HoodieIndex;
 import java.io.IOException;
 import java.util.List;
 import java.util.Map;
+import java.util.stream.Collectors;
+import org.apache.avro.Schema.Field;
 import org.apache.avro.generic.GenericRecord;
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.api.java.JavaSparkContext;
@@ -47,7 +49,8 @@ public class DataSourceUtils {
   public static String getNestedFieldValAsString(GenericRecord record, String fieldName) {
     String[] parts = fieldName.split("\\.");
     GenericRecord valueNode = record;
-    for (int i = 0; i < parts.length; i++) {
+    int i = 0;
+    for (;i < parts.length; i++) {
       String part = parts[i];
       Object val = valueNode.get(part);
       if (val == null) {
@@ -65,7 +68,9 @@ public class DataSourceUtils {
         valueNode = (GenericRecord) val;
       }
     }
-    throw new HoodieException(fieldName + " field not found in record");
+    throw new HoodieException(fieldName + "(Part -" + parts[i] + ") field not found in record. "
+        + "Acceptable fields were :" + valueNode.getSchema().getFields()
+        .stream().map(Field::name).collect(Collectors.toList()));
   }
 
   /**