test: fix integration with metrics 0.17.0+

In metrics 0.17.0 cartridge hotreload was migrated to metrics cartridge
role. The role must be enabled if we want to work with metrics+cartridge
features.

Author: DifferentialOrange

test/entrypoint/srv_stats.lua

@@ -51,15 +51,21 @@ if crud_utils.is_cartridge_hotreload_supported() then
     roles_reload_allowed = true
 end
 
+local is_metrics = pcall(require, 'metrics')
+local roles = {
+    'cartridge.roles.crud-router',
+    'cartridge.roles.crud-storage',
+    'customers-storage',
+}
+if is_metrics then
+    table.insert(roles, 'cartridge.roles.metrics')
+end
+
 local ok, err = errors.pcall('CartridgeCfgError', cartridge.cfg, {
     advertise_uri = 'localhost:3301',
     http_port = 8081,
     bucket_count = 3000,
-    roles = {
-        'cartridge.roles.crud-router',
-        'cartridge.roles.crud-storage',
-        'customers-storage',
-    },
+    roles = roles,
     roles_reload_allowed = roles_reload_allowed,
 })
 

test/integration/stats_test.lua

@@ -851,7 +851,7 @@ end
 -- https://github.com/tarantool/metrics/blob/fc5a67072340b12f983f09b7d383aca9e2f10cf1/test/utils.lua#L22-L31
 local function find_obs(metric_name, label_pairs, observations)
     for _, obs in pairs(observations) do
-        local same_label_pairs = pcall(t.assert_equals, obs.label_pairs, label_pairs)
+        local same_label_pairs = pcall(t.assert_covers, obs.label_pairs, label_pairs)
         if obs.metric_name == metric_name and same_label_pairs then
             return obs
         end