[HUDI-2079] Make CLI command tests functional (#3601)

Make all tests in org.apache.hudi.cli.commands extend org.apache.hudi.cli.functional.CLIFunctionalTestHarness and tag as "functional".

This also resolves a blocker where DFS init consistently failed when moving to ubuntu 18.04

hudi-cli/src/main/java/org/apache/hudi/cli/HoodieCLI.java

@@ -44,7 +44,7 @@ public class HoodieCLI {
   protected static HoodieTableMetaClient tableMetadata;
   public static HoodieTableMetaClient syncTableMetadata;
   public static TimelineLayoutVersion layoutVersion;
-  private static TempViewProvider tempViewProvider;
+  public static TempViewProvider tempViewProvider;
 
   /**
    * Enum for CLI state.
@@ -114,17 +114,4 @@ public class HoodieCLI {
 
     return tempViewProvider;
   }
-
-  /**
-   * Close tempViewProvider.
-   * <p/>
-   * For test, avoid multiple SparkContexts.
-   */
-  public static synchronized void closeTempViewProvider() {
-    if (tempViewProvider != null) {
-      tempViewProvider.close();
-      tempViewProvider = null;
-    }
-  }
-
 }

hudi-cli/src/main/java/org/apache/hudi/cli/utils/SparkTempViewProvider.java

@@ -56,6 +56,11 @@ public class SparkTempViewProvider implements TempViewProvider {
     }
   }
 
+  public SparkTempViewProvider(JavaSparkContext jsc, SQLContext sqlContext) {
+    this.jsc = jsc;
+    this.sqlContext = sqlContext;
+  }
+
   @Override
   public void createOrReplace(String tableName, List<String> headers, List<List<Comparable>> rows) {
     try {