[O2-5887] Avoid empty URLs (#2608)

Author: Barthelemy

Framework/test/testCheck.cxx

@@ -149,8 +149,8 @@ TEST_CASE("test_check_activity")
                 "TST",
                 "",
                 {},
-                "",
-                { { "implementation", "CCDB" }, { "host", "" } },
+                "something",
+                { { "implementation", "CCDB" }, { "host", "something" } },
                 "test",
                 UpdatePolicyType::OnAny,
                 {},

Framework/test/testTaskInterface.cxx

@@ -172,7 +172,7 @@ TEST_CASE("test_task_factory")
     "TST",
     "",
     {},
-    "",
+    "something",
     {},
     "SkeletonTaskRunner",
     "skeletonTask",

Modules/Example/test/testFactory.cxx

@@ -30,6 +30,7 @@ BOOST_AUTO_TEST_CASE(Task_Factory)
   config.moduleName = "QcCommon";
   config.className = "o2::quality_control_modules::example::ExampleTask";
   config.detectorName = "DAQ";
+  config.ccdbUrl = "something";
   auto manager = make_shared<ObjectsManager>(config.taskName, config.className, config.detectorName, 0);
   try {
     gSystem->AddDynamicPath("lib:../../lib:../../../lib:.:"); // add local  paths for the test