[pgadmin4][patch] Correct issue on external tables

[Joao De Almeida Pereira]

Hi Hackers,

You can find attached a patch that corrects the RM #3431.

When trying to retrieve the DDL of an external table and exceptions was
being raised.

Thanks
Joao

diff --git a/web/pgadmin/browser/server_groups/servers/databases/external_tables/templates/sql/gpdb_5.0_plus/create.sql b/web/pgadmin/browser/server_groups/servers/databases/external_tables/templates/sql/gpdb_5.0_plus/create.sql
index a7f64a5f..25ebf96c 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/external_tables/templates/sql/gpdb_5.0_plus/create.sql
+++ b/web/pgadmin/browser/server_groups/servers/databases/external_tables/templates/sql/gpdb_5.0_plus/create.sql
@@ -48,7 +48,7 @@ OPTIONS (
 )
 {% endif %}
 ENCODING '{{ table.pgEncodingToChar }}'
-{% if table.rejectLimit and table.rejectLimit|length > 0 %}
+{% if table.rejectLimit and table.rejectLimit > 0 %}
 {%   if table.errorTableName and table.errorTableName|length > 0 %}
 LOG ERRORS {% endif %}SEGMENT REJECT LIMIT {{ table.rejectLimit }} {{ rejectionLimit }}
 {% endif %}