fixup! fix: remove group exist cache in fetchListOfGroups

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

apps/user_ldap/tests/AccessTest.php

@@ -658,7 +658,7 @@ public function testFetchListOfGroupsKnown() {
  $this->groupMapper->expects($this->never())
  ->method('getNameByDN');
 
- $this->connection->expects($this->exactly(3))
+ $this->connection->expects($this->exactly(1))
  ->method('writeToCache');
 
  $groups = $this->access->fetchListOfGroups($filter, $attributes);