Bug 1601095, rename the test files in /cap from .xul to .xhtml r=bgrins

Differential Revision: https://phabricator.services.mozilla.com/D55832

--HG--
rename : caps/tests/mochitest/test_bug995943.xul => caps/tests/mochitest/test_bug995943.xhtml
rename : caps/tests/mochitest/test_disableScript.xul => caps/tests/mochitest/test_disableScript.xhtml
extra : moz-landing-system : lando

caps/tests/mochitest/chrome.ini

@@ -6,7 +6,7 @@ support-files =
   !/caps/tests/mochitest/file_data.txt
   !/caps/tests/mochitest/file_disableScript.html
 
-[test_bug995943.xul]
+[test_bug995943.xhtml]
 skip-if = (verify && debug && (os == 'mac'))
 [test_addonMayLoad.html]
-[test_disableScript.xul]
+[test_disableScript.xhtml]

caps/tests/mochitest/test_disableScript.xhtml

@@ -19,6 +19,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=840488
 
   <!-- test code goes here -->
   <script type="application/javascript">
+  /* eslint-disable mozilla/no-useless-parameters, no-redeclare, no-undef */
   <![CDATA[
 
   /** Test for all the different ways that script can be disabled for a given global. **/