feat: make fabric test setup more reliable by just asserting the deletion of a shards db

Author: janl

src/fabric/test/eunit/fabric_tests.erl

@@ -386,7 +386,10 @@ delete_dbs(DbList) ->
 
 setup_fabric() ->
     Ctx = test_util:start_couch([fabric]),
-    ok = clear_shards_db(),
+    ok = case clear_shards_db() of
+        ok -> ok;
+        not_found -> ok
+    end,
     Ctx.
 
 teardown_fabric(Ctx) ->