Let memory limit set in tests fit the used amount

Signed-off-by: Julius Härtl <jus@bitgrid.net>

tests/lib/MemoryInfoTest.php

@@ -60,10 +60,9 @@ class MemoryInfoTest extends TestCase {
 	public function getMemoryLimitTestData(): array {
 		return [
 			'unlimited' => ['-1', -1,],
-			'0' => ['0', 0,],
-			'134217728 bytes' => ['134217728', 134217728,],
-			'128M' => ['128M', 134217728,],
-			'131072K' => ['131072K', 134217728,],
+			'524288000 bytes' => ['524288000', 524288000,],
+			'500M' => ['500M', 524288000,],
+			'512000K' => ['512000K', 524288000,],
 			'2G' => ['2G', 2147483648,],
 		];
 	}