Update the heap_mastercrash_before_truncate answer file.

src/test/tinc/tincrepo/mpp/gpdb/tests/storage/vacuum/scenario/xml/heap_mastercrash_before_truncate.xml

@@ -49,7 +49,7 @@ select pg_relation_size('ivfheap') from gp_dist_random('gp_id') where gp_segment
             ]]></pre>
         <trigger><![CDATA[
 vacuum full vfheap;
-PANIC:  fault triggered, fault name:'vacuum_full_before_truncate' fault type:'panic'
+PATH1/heap_mastercrash_before_truncate_trigger.sql:7: PANIC:  fault triggered, fault name:'vacuum_full_before_truncate' fault type:'panic'
 server closed the connection unexpectedly
 	This probably means the server terminated abnormally
 	before or while processing the request.