Don't limit ext4 volume size when 64bit feature is available (#766910)

E2fsprogs 1.42 adds ext4 64bit feature [1] allowing volume sizes larger
than 16 TiB.  However only enable large volumes from e2fsprogs 1.42.9
when a large number of 64bit bugs were fixed [2].  (Also RHEL / CentOS 7
use e2fsprogs 1.42.9 and always enable 64bit feature by default).

[1] Release notes, E2fsprogs 1.42 (November 29, 2011)
    http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.42

    "This release of e2fsprogs has support for file systems > 16TB.
    Online resize requires kernel support which will hopefully be in
    Linux version 3.2.  Offline support is not yet available for > 16TB
    file systems, but will be coming".

[2] Release notes, E2fsprogs 1.42.9 (December 28, 2013)
    http://e2fsprogs.sourceforge.net/e2fsprogs-release.html#1.42.9

    "Fixed a large number of bugs in resize2fs, e2fsck, debugfs, and
    libext2fs to correctly handle bigalloc and 64-bit file systems.
    There were many corner cases that had not been noticed in previous
    uses of these file systems, since they are not as common.  Some of
    the bugs could cause file system corruption or data loss, so users
    of 64-bit or bigalloc file systems are strongly urged to upgrade to
    e2fsprogs 1.42.9".

Bug 766910 - Multiple boot loaders don't work on 64bit EXT4 file systems