Change all hook_menu() implementations to *.menu_links.yml files, add tests

Problem/Motivation

Drupal 8 has dropped hook_menu() in favor of hook_menu_links_default(), which in turn has been superseded by the use of YAML files.

Change records here:

• https://drupal.org/node/2184797
• https://drupal.org/node/2228089

Many of the D8 examples still have hook_menu(), and these should be converted.

Also, in accordance with the Examples module checklist, each of these menu paths should have a functional test, to make sure they work properly.

Proposed resolution

The following modules still have hook_menu() implementations:

• block_example #2241405: Update Block example to use *.menu_links.yml, add tests
• cache_example #2277357: Update Cache Example to use *.menu_links.yml, add tests
• dbtng_example #2277359: Update DBTNG Example to test *.menu_links.yml
• email_example #2277361: Update Email Example to use *.menu_links.yml, add tests
• js_example #2218567: Update js_example to demonstrate *.libraries.yml
• node_type_example #2277363: Update Node Type Example to use *.menu_links.yml, add tests
• page_example #2241499: Update Page Example to use *.menu_links.yml, add tests
• phpunit_example #2276929: Update PHPUnit Example to use *.menu_links.yml, add tests
• simpletest_example #2277365: Update SimpleTest Example to use *.menu_links.yml, add tests
• tour_example #2277367: Update Tour Example to use *.menu_links.yml, add tests

For each of these, we need to do the following:

• Convert the module to using *.menu_links.yml files.
• Write a test which verifies that 1) The menu links appear on the front page, and also that 2) A request to each link yields a result of 200. The PHPUnit Example module has a test for the presence of the menu items. We should follow its lead with all of these.
• We can also verify that there is a test which performs drupalGet() on the path, to make sure the route is set up correctly in addition to the menu link.

Create a separate issue for each module and link to it here.

Remaining tasks

User interface changes

API changes