Web services: Minor lang string fixes (Bug #1432523)

Change-Id: I6c1032fd9e9e6795aceaf32a2a16302b3eddbf84
Signed-off-by: Kristina D.C. Hoeppner <kristina@catalyst.net.nz>

htdocs/lib/web.php

@@ -2333,7 +2333,7 @@ function admin_nav() {
         $menu['configextensions/webservices'] = array(
             'path'   => 'configextensions/webservices',
             'url'    => 'webservice/admin/index.php',
-            'title'  => get_string('webservices', 'auth.webservice'),
+            'title'  => get_string('webservice', 'auth.webservice'),
             'weight' => 50,
         );
     }

test/behat/features/random_clicking.feature

@@ -101,6 +101,6 @@ Scenario: Clicking randomly around Mahara (Selenium)
     And I choose "HTML filters" in "Extensions"
     And I choose "Allowed iframe sources" in "Extensions"
     And I choose "Clean URLs" in "Extensions"
-    And I choose "WebServices" in "Extensions"
+    And I choose "Web services" in "Extensions"
     # The test should be completed once if Return to site works successfully
     Then I follow "Return to site"