MAGETWO-42268: Fix new builds

- removed caching logic from Web API tests

Author: Olga Kopylova

Diff for: dev/tests/api-functional/framework/bootstrap.php

@@ -37,7 +37,15 @@
 }
 unset($iterator, $file);
 
-unlink(__DIR__ . '/../../../../app/etc/paths.php');
+// Register the modules under '_files/'
+$pathPattern = $pathToInstalledMagentoInstanceModules . '/TestModule*/registration.php';
+$files = glob($pathPattern, GLOB_NOSORT);
+if ($files === false) {
+    throw new \RuntimeException('glob() returned error while searching in \'' . $pathPattern . '\'');
+}
+foreach ($files as $file) {
+    include $file;
+}
 
 /* Bootstrap the application */
 $settings = new \Magento\TestFramework\Bootstrap\Settings($testsBaseDir, get_defined_constants());