[HOPS-1588] truncate leader election tables on upgrade

Author: smkniazi

schema/update-schema_2.8.2.10_to_3.2.0.0.sql

@@ -86,3 +86,7 @@ ALTER TABLE hdfs_retry_cache_entry DROP PRIMARY KEY;
 ALTER TABLE hdfs_retry_cache_entry ADD PRIMARY KEY (`client_id`,`call_id`,`epoch`) PARTITION BY KEY (`epoch`);
 
 insert into hdfs_variables (id, value) select 39, 0x0000000000000000 where (select count(*) from hdfs_variables)>0;
+
+TRUNCATE TABLE hdfs_le_descriptors;
+
+TRUNCATE TABLE yarn_le_descriptors;