Fix unit test function name so that test runs (and fails)

[phil-davis]

Steps to reproduce

1. fix https://github.com/owncloud/announcementcenter/pull/20/files#diff-1879b41e5a6d3340aeaa60e56c81373fR167
   public function te1stAnnouncement() => public function testAnnouncement()
2. make test-php-unit

Expected behaviour

Unit tests pass

Actual behaviour

make test-php-unit
composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Nothing to install or update
Generating autoload files
php -d zend.enable_gc=0 "/home/phil/git/owncloud/core/apps-external/announcementcenter/../../lib/composer/bin/phpunit" --configuration ./phpunit.xml --testsuite unit
PHPUnit 6.5.14 by Sebastian Bergmann and contributors.

Runtime:       PHP 7.2.16-1+ubuntu18.04.1+deb.sury.org+1 with Xdebug 2.7.0
Configuration: /home/phil/git/owncloud/core/apps-external/announcementcenter/phpunit.xml

............................................................F     61 / 61 (100%)

Time: 1.61 seconds, Memory: 22.00MB

There was 1 failure:

1) OCA\AnnouncementCenter\Tests\Unit\Notification\NotifierTest::testAnnouncement
Failed asserting that null is of type "int".

/home/phil/git/owncloud/core/apps-external/announcementcenter/tests/Unit/Notification/NotifierTest.php:197

FAILURES!
Tests: 61, Assertions: 140, Failures: 1.

Generating code coverage report in Clover XML format ... done
Makefile:108: recipe for target 'test-php-unit' failed
make: *** [test-php-unit] Error 1

Note: before fixing the function name, only 60 tests are running. Test 61 has not been running.

Server configuration

git clone development environment or drone

[phil-davis]

@PVince81 how many more unit tests do we have with that do not run because of typos like this?

The original PR #20 was merged with no review.

[PVince81]

I can't believe this would be a legit typo... maybe he just wanted to temporarily disable the test. I usually rename "test" to "xtest" to disable tests...

this app used to be a bit of a "side project" back at the time which is why there were no reviews...

[phil-davis]

@PVince81 @micbar I came across this again just now when being asked about announcement centre tests.
At https://github.com/owncloud/announcementcenter/blob/master/tests/Unit/Notification/NotifierTest.php#L196 $announcement is NULL but $this->manager->announce() has code to return an array, so something odd is going on.
Should someone look at this?