[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-spark/pom.xml

@@ -213,9 +213,9 @@
 
     <!-- Spark (Packages) -->
     <dependency>
-      <groupId>com.databricks</groupId>
+      <groupId>org.apache.spark</groupId>
       <artifactId>spark-avro_2.11</artifactId>
-      <version>4.0.0</version>
+      <scope>provided</scope>
     </dependency>
 
     <!-- Hadoop -->
@@ -239,8 +239,19 @@
     <!-- Hive -->
     <dependency>
       <groupId>${hive.groupid}</groupId>
-      <artifactId>hive-service</artifactId>
+      <artifactId>hive-exec</artifactId>
       <version>${hive.version}</version>
+      <classifier>${hive.exec.classifier}</classifier>
+      <exclusions>
+        <exclusion>
+          <groupId>javax.mail</groupId>
+          <artifactId>mail</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>org.eclipse.jetty.aggregate</groupId>
+          <artifactId>*</artifactId>
+        </exclusion>
+      </exclusions>
     </dependency>
     <dependency>
       <groupId>${hive.groupid}</groupId>