testsuite: update resource exclude test

Problem: flux-core is deprecating the capability to change
resource.exclude on the fly, but t1013-exclusion.t relies on
this capability.

Change the test to reload the resource module when the
configuration changes.

Note: "noverify = true" needed to be added to allow flux-core
resource to be restarted on rank 0 with fake resources, otherwise the
mismatched hostname causes rank 0 to be drained.

t/t1013-exclusion.t

@@ -9,24 +9,19 @@ excl_4N4B="${hwloc_basepath}/004N/exclusive/04-brokers-sierra2"
 
 skip_all_unless_have jq
 
-export FLUX_CONF_DIR=$(pwd)
+cat >resource.toml <<-EOT
+[resource]
+exclude = "0-3"
+EOT
 
 export FLUX_SCHED_MODULE=none
-test_under_flux 4
+test_under_flux 4 full -o,--config-path=$(pwd)/resource.toml
 
 test_expect_success 'exclusion: generate jobspecs' '
     flux run --dry-run -N 4 -n 4 -c 44 -g 4 -t 1h sleep 3600 > basic.json &&
     flux run --dry-run -N 1 -n 1 -c 44 -g 4 -t 1h sleep 3600 > 1N.json
 '
 
-test_expect_success 'exclusion: load config with resource exclusions' '
-    cat >resource.toml <<-EOF &&
-	[resource]
-	exclude = "0-3"
-EOF
-    flux config reload
-'
-
 test_expect_success 'load test resources' '
     load_test_resources ${excl_4N4B}
 '
@@ -50,11 +45,15 @@ test_expect_success 'exclusion: removing fluxion modules' '
     remove_resource
 '
 test_expect_success 'exclusion: reloading resource with a config file' '
+    flux module remove resource &&
     cat >resource.toml <<-EOF &&
 	[resource]
 	exclude = "2-3"
+	noverify = true
 EOF
-    flux config reload
+    flux config load resource.toml &&
+    flux module load resource &&
+    load_test_resources ${excl_4N4B}
 '
 
 test_expect_success 'exclusion: loading fluxion modules works' '