Reorder gp_toolkit test

gp_toolkit tests runs a query which checks if there are any GUCs
which have different value on the cluster node. However, test
udf_exception_blocks_panic_scenarios is executed before it and it
injects PANIC which causes recovery and it takes some time for all
the GUCs to be in consistent state between the segments. But by that
time gp_toolkit identifies difference and fails, so moving gp_toolkit
test above it.

src/test/regress/greenplum_schedule

@@ -72,6 +72,11 @@ test: sreh
 #test: olap_window
 #test: tpch500GB
 
+# gp_toolkit performs a vacuum and checks that it truncated the relation. That
+# might not happen if other backends are holding transactions open, preventing
+# vacuum from removing dead tuples.
+test: gp_toolkit
+
 # FIXME: These tests no longer work, because they try to set
 # gp_interconnect_type, which doesn't work:
 # ERROR:  parameter "gp_interconnect_type" cannot be set after connection start
@@ -88,11 +93,6 @@ test: resource_queue_function
 test: resource_group
 test: wrkloadadmin
 
-# gp_toolkit performs a vacuum and checks that it truncated the relation. That
-# might not happen if other backends are holding transactions open, preventing
-# vacuum from removing dead tuples.
-test: gp_toolkit
-
 test: gp_toolkit_ao_funcs trig auth_constraint role portals_updatable plpgsql_cache timeseries pg_stat_last_operation gp_numeric_agg partindex_test partition_pruning runtime_stats
 test: rle rle_delta dsp not_out_of_shmem_exit_slots