Bug 1400786 - Use a startup_timeout of 180s for Marionette on all platforms. r=gbrown

Currently only the Mochitests on Linux use a startup_timeout of 180s
for Marionette. This would also be necessary for the other platforms
(MacOS and Windows).

MozReview-Commit-ID: TGO7XDLXdI

--HG--
extra : rebase_source : 29219cc51404cebf22e894966294eae687bb5d68

testing/mozharness/configs/unittests/mac_unittest.py

@@ -86,6 +86,7 @@ config = {
                 "--log-errorsummary=%(error_summary_file)s",
                 "--screenshot-on-fail",
                 "--cleanup-crashes",
+                "--marionette-startup-timeout=180",
                 "--work-path=%(abs_work_dir)s",
             ],
             "run_filename": "runtests.py",

testing/mozharness/configs/unittests/win_taskcluster_unittest.py

@@ -99,6 +99,7 @@ config = {
                 "--log-errorsummary=%(error_summary_file)s",
                 "--screenshot-on-fail",
                 "--cleanup-crashes",
+                "--marionette-startup-timeout=180",
             ],
             "run_filename": "runtests.py",
             "testsdir": "mochitest"