Disable selinux setup on centos during boot

Fixes an issue where /dev was mounted twice

[Delivers #58643330]

Signed-off-by: Jeffrey Peckham <peckham@pivotallabs.com>
Revert "Increased default disk size for vsphere infrastructure"

This reverts commit 643b4e175628fe11f54bd3daf33a5fcf38350b49.