Multi FS Support

- Reviving PR 191, to make FileSystem creation off actual path
 - Streamline all filesystem access to HoodieTableMetaClient
 - Hadoop Conf from Spark Context serialized & passed to executor code too
 - Pick up env vars prefixed with HOODIE_ENV_ into Configuration object
 - Cleanup usage of FSUtils.getFS, piggybacking off HoodieTableMetaClient.getFS
 - Adding s3a to supported schemes & support escaping "." in env vars
 - Tests use HoodieTestUtils.getDefaultHadoopConf

hoodie-client/src/main/java/com/uber/hoodie/func/LazyInsertIterable.java

@@ -72,7 +72,8 @@ public class LazyInsertIterable<T extends HoodieRecordPayload> extends
         HoodieIOHandle.cleanupTmpFilesFromCurrentCommit(hoodieConfig,
             commitTime,
             record.getPartitionPath(),
-            TaskContext.getPartitionId());
+            TaskContext.getPartitionId(),
+            hoodieTable);
         partitionsCleaned.add(record.getPartitionPath());
       }