This change fixes a couple issues with the num_dist_tables column of
the timescaledb_information.data_node view. The first fix will
allow the column to correctly report 0 when no tables are yet created
(it currently will count a NULL table as 1 in this case). The second
fix addresses a bug in the dist_util_remote_hypertable_info function
which was causing the code to only see the first hypertable returned.
This second bug will also cause incorrect results for many of our usage
reporting views and utilities when there are multiple distributed
hypertables.
3d3824dbc1