expect call of getSlogan() exactly twice

Signed-off-by: Stephan Müller <mail@stephanmueller.eu>
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

apps/sharebymail/tests/ShareByMailProviderTest.php

@@ -828,7 +828,7 @@ class ShareByMailProviderTest extends TestCase {
 			->method('setReplyTo')
 			->with(['owner@example.com' => 'Mrs. Owner User']);
 		$this->defaults
-			->expects($this->once())
+			->expects($this->exactly(2))
 			->method('getSlogan')
 			->willReturn('Testing like 1990');
 		$template