Bug 1592934 - Disable test_qm_first_initialization_attempt.js on Thunderbird, which doesn't have the Telemetry probe tested. r=ttung

Differential Revision: https://phabricator.services.mozilla.com/D54238

--HG--
extra : moz-landing-system : lando

dom/quota/test/unit/xpcshell.ini

@@ -52,6 +52,7 @@ support-files =
 [test_persist_globalLimit.js]
 [test_persist_groupLimit.js]
 [test_qm_first_initialization_attempt.js]
+skip-if = appname == "thunderbird"
 [test_removeLocalStorage.js]
 [test_simpledb.js]
 [test_specialOrigins.js]