Git commits in Moodle 2.8.4 by Tony Levi

commit bd8926f9f3cb8352e1f27bf9feb7f252b54bd5c9
Author: Tony Levi <tony.levi@netspot.com.au>
Date:   Wed, 21 Jan 2015 18:54:26 +0800
Tag:    v2.8.4

MDL-49110 behat: Do not poll within spin for non-javascript mode

commit 846711d69fafcf5fce68ea739331d831af9e71ff
Author: Tony Levi <tony.levi@netspot.com.au>
Date:   Tue, 06 Jan 2015 08:12:05 +0800
Tag:    v2.8.4

MDL-48924 backup: Fix some get_file_packer() calls for enabletgzbackups