Fix issue #134 (#135)

* Aligned armhfp ks on the x86_64 one

* Add architecture to basesearch for i386 image

* Set the default IO scheduler to noop (#124)

The best IO scheduler for a VM is noop, not the default cfq.  We have to
send the disk sectors to be written or read as fast as possible to the
host OS, which is the only one able to optimize and reorder the disk
operations considering the needs of all hosted VMs and other
applications that might be running.

The RedHat documentation also recommends noop for guest VMs, unless they
use dedicated raw partitions (not the case for Vagrant images).

* Add open-vm-tools to the images

Fixes issue #134

* Do not add open-vm-tools to centos/6

The package appears not to exist in CentOS Linux 6.

* Use the proper syntax for the services line

vagrant/centos7.ks

@@ -10,6 +10,7 @@ firewall --disabled
 authconfig --enableshadow --enablemd5
 selinux --enforcing
 timezone --utc UTC
+services --enabled=vmtoolsd
 # The biosdevname and ifnames options ensure we get "eth0" as our interface
 # even in environments like virtualbox that emulate a real NW card
 bootloader --timeout=1 --append="no_timer_check console=tty0 console=ttyS0,115200n8 net.ifnames=0 biosdevname=0 elevator=noop"
@@ -32,6 +33,7 @@ cifs-utils
 chrony
 yum-utils
 hyperv-daemons
+open-vm-tools
 -e2fsprogs
 -btrfs-progs
 # Vagrant boxes aren't normally visible, no need for Plymouth