Issue #3106216 by Spokje, longwave, alexpott, apaderno, Hardik_Patel_12, daffie: Remove unused variables from core

Issue #3151118 by alexpott, Beakerboy, kapilkumar0324, anmolgoyal74, jungle, heddn, Mile23, andypost, daffie: Include bootstrap.inc using composer

Issue #3129508 by Lal_, daffie, Suresh Prabhu Parkala: Change multiple dirname()'s into a single dirname() with the use of the second parameter of dirname()

Issue #2572643 by alexpott, attiks, Jelle_S, jhodgdon: Fix Drupal.Commenting.FileComment coding standard

Issue #2497323 by jhedstrom, dawehner, alexpott, larowlan: Create a php script that can dump a database for testing update hooks