Bug 1406042 - Copy relevant old console test to the new frontend; r=H…

…onza

This patch copies the tests from the old frontend that are relevant
in the context of the new frontend. They are all added in the
browser.ini and all are skipped. The number of the bug to do the test
migration is indicated as a comment.
Some tests were renamed to match what they actually do, or to match
which component they test (console, webconsole, jsterm), or simply to remove
a bug number in the filename. In the latter case, a reference to the bug
was added inside the test if it wasn't already the case.

All the support files from the old frontend were copied over, because it would
have been time consuming to test if each one of them was used in the tests. A bug
will be filed to do a support files cleanup when all the tests are migrated.

MozReview-Commit-ID: GhXcCuVBXT5

.eslintignore

@@ -119,6 +119,7 @@ devtools/client/storage/test/*.html
 !devtools/client/storage/test/storage-unsecured-iframe-usercontextid.html
 devtools/client/webaudioeditor/**
 devtools/client/webconsole/net/**
+devtools/client/webconsole/new-console-output/test/mochitest/**
 devtools/client/webconsole/test/**
 devtools/client/webconsole/hudservice.js
 devtools/client/webconsole/webconsole-connection-proxy.js

devtools/client/webconsole/new-console-output/test/mochitest/.eslintrc.js

@@ -0,0 +1,6 @@
+"use strict";
+
+module.exports = {
+  // Extend from the shared list of defined globals for mochitests.
+  "extends": "../../../../../.eslintrc.mochitests.js"
+};