[HUDI-756] Organize Cleaning Action execution into a single package in hudi-client (#1485)

- Introduced a thin abstraction ActionExecutor, that all actions will implement
- Pulled cleaning code from table, writeclient into a single package
- CleanHelper is now CleanPlanner, HoodieCleanClient is no longer around
- Minor refactor of HoodieTable factory method
- HoodieTable.create() methods with and without metaclient passed in
- HoodieTable constructor now does not do a redundant instantiation
- Fixed existing unit tests to work at the HoodieWriteClient level

hudi-common/src/test/java/org/apache/hudi/common/model/HoodieTestUtils.java

@@ -328,7 +328,7 @@ public class HoodieTestUtils {
       // Create the clean metadata
 
       HoodieCleanMetadata cleanMetadata =
-          CleanerUtils.convertCleanMetadata(metaClient, instantTime, Option.of(0L), Collections.singletonList(cleanStats));
+          CleanerUtils.convertCleanMetadata(instantTime, Option.of(0L), Collections.singletonList(cleanStats));
       // Write empty clean metadata
       os.write(TimelineMetadataUtils.serializeCleanMetadata(cleanMetadata).get());
     }

hudi-common/src/test/java/org/apache/hudi/common/table/view/TestIncrementalFSViewSync.java

@@ -414,8 +414,7 @@ public class TestIncrementalFSViewSync extends HoodieCommonTestHarness {
 
     HoodieInstant cleanInflightInstant = new HoodieInstant(true, HoodieTimeline.CLEAN_ACTION, cleanInstant);
     metaClient.getActiveTimeline().createNewInstant(cleanInflightInstant);
-    HoodieCleanMetadata cleanMetadata = CleanerUtils
-        .convertCleanMetadata(metaClient, cleanInstant, Option.empty(), cleanStats);
+    HoodieCleanMetadata cleanMetadata = CleanerUtils.convertCleanMetadata(cleanInstant, Option.empty(), cleanStats);
     metaClient.getActiveTimeline().saveAsComplete(cleanInflightInstant,
         TimelineMetadataUtils.serializeCleanMetadata(cleanMetadata));
   }