test: Allow clipboard on Zelenium tests

In Support request test we trigger clipboard API to copy RSS Link

But, if you running tests manually in your browser, clipboard will fail.
For now, we guarantee that is not break tests on test node

product/ERP5Type/tests/ERP5TypeFunctionalTestCase.py

@@ -226,6 +226,15 @@ class FunctionalTestRunner:
     # Service workers are disabled on Firefox 52 ESR:
     # https://bugzilla.mozilla.org/show_bug.cgi?id=1338144
     options.set_preference('dom.serviceWorkers.enabled', True)
+    # Allow Clipboard
+    # http://kb.mozillazine.org/Granting_JavaScript_access_to_the_clipboard
+    options.set_preference("capability.policy.policynames", "allowclipboard")
+    options.set_preference(
+        "capability.policy.allowclipboard.sites",
+        self._getTestBaseURL())
+    options.set_preference("capability.policy.allowclipboard.Clipboard.cutcopy", "allAccess")
+    options.set_preference("capability.policy.allowclipboard.Clipboard.paste", "allAccess")
+
     # output javascript console and errors on stdout to help diagnosing failures
     options.set_preference('devtools.console.stdout.content', True)
     # Always download attachments and do not open PDF inline, otherwise the