test: remove phpunit's TAP output configuration

It is not supported by recent phpunit versions (see [1]) and is not
actually used in our testing process. So it becomes just dead code and
it worth to remove it.

We'll bring newer phpunit versions in further commits to test the
connector against more recent PHP versions (see [2]).

[1]: sebastianbergmann/phpunit#2683
[2]: https://phpunit.de/supported-versions.html

Author: Totktonada

test/shared/phpunit.xml

@@ -0,0 +1,17 @@
+<phpunit
+  colors ="true"
+  verbose="true"
+>
+  <testsuites>
+    <testsuite name="Basic PHP Tests">
+      <file>test/AssertTest.php</file>
+      <file>test/CreateTest.php</file>
+      <file>test/DMLTest.php</file>
+      <file>test/MockTest.php</file>
+      <file>test/MsgPackTest.php</file>
+      <file>test/AssertTest.php</file>
+      <file>test/RandomTest.php</file>
+    </testsuite>
+  </testsuites>
+
+</phpunit>