Revert "Issue #1956914 by chaby, pounard: Use a single cache_get_multiple() call per region instead of a cache_get() per block in _block_render_blocks()."

This reverts commit 43c8918f96612d6ab37e8ca122e0f7c0ac4520a1.
Merge branch '7.x' of git://github.com/drupal/drupal
module upgrades
fixes