Group Database backend must not gather user details itself but ask user

backends. This is a port to master from PR #7745

remove OC_GROUP_BACKEND_GET_DISPLAYNAME option for group backends

Conflicts:
	lib/private/group/backend.php

LDAP: getDisplayNamesInGroup is not an option for group backends anymore

Conflicts:
	apps/user_ldap/group_ldap.php
	apps/user_ldap/group_proxy.php

clean up group backends

Conflicts:
	lib/private/group/database.php

remove now unnecessary test

implement getDisplayNames in group manager

adjust user manager tests

test for group manager's displayNamesInGroup

trim must not be used in empty in PHP < 5.5

keep the constant to not provoke PHP warnings

Conflicts:
	lib/private/group/backend.php

1 files changed, 5 insertions, 5 deletions

diff --git a/tests/lib/user/manager.php b/tests/lib/user/manager.php
index 8ca0f94c6fa..fd0931af7e4 100644
--- a/tests/lib/user/manager.php
+++ b/tests/lib/user/manager.php
@@ -190,8 +190,8 @@ class Manager extends \PHPUnit_Framework_TestCase {
 
 		$result = $manager->search('fo');
 		$this->assertEquals(2, count($result));
-		$this->assertEquals('afoo', $result[0]->getUID());
-		$this->assertEquals('foo', $result[1]->getUID());
+		$this->assertEquals('afoo', array_shift($result)->getUID());
+		$this->assertEquals('foo', array_shift($result)->getUID());
 	}
 
 	public function testSearchTwoBackendLimitOffset() {
@@ -219,9 +219,9 @@ class Manager extends \PHPUnit_Framework_TestCase {
 
 		$result = $manager->search('fo', 3, 1);
 		$this->assertEquals(3, count($result));
-		$this->assertEquals('foo1', $result[0]->getUID());
-		$this->assertEquals('foo2', $result[1]->getUID());
-		$this->assertEquals('foo3', $result[2]->getUID());
+		$this->assertEquals('foo1', array_shift($result)->getUID());
+		$this->assertEquals('foo2', array_shift($result)->getUID());
+		$this->assertEquals('foo3', array_shift($result)->getUID());
 	}
 
 	public function testCreateUserSingleBackendNotExists() {