Do not use boot=on on IDE device

the followup on the boot=on problem, basically it's not needed to
specify it when booting out of IDE devices when using KVM
* src/qemu/qemu_conf.c: do not use boot=on for IDE devices
* tests/qemuxml2argvdata/qemuxml2argv*.args: this changes the output
  for 5 of the tests

src/qemu/qemu_conf.c

@@ -2647,7 +2647,8 @@ qemuBuildDriveStr(virDomainDiskDefPtr disk,
         }
     }
     if (bootable &&
-        disk->device == VIR_DOMAIN_DISK_DEVICE_DISK)
+        disk->device == VIR_DOMAIN_DISK_DEVICE_DISK &&
+        disk->bus != VIR_DOMAIN_DISK_BUS_IDE)
         virBufferAddLit(&opt, ",boot=on");
     if (disk->readonly &&
         qemuCmdFlags & QEMUD_CMD_FLAG_DEVICE)

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-boot-disk.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0,boot=on -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0 -net none -serial none -parallel none -usb
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0 -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-fat.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=fat:/var/somefiles,if=ide,bus=0,unit=0,boot=on -net none -serial none -parallel none -usb
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=fat:/var/somefiles,if=ide,bus=0,unit=0 -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-fmt-qcow.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0,boot=on,format=qcow2 -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0,format=raw -net none -serial none -parallel none -usb
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0,format=qcow2 -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0,format=raw -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-disk-virtio.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0,boot=on -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0 -drive file=/tmp/data.img,if=virtio -drive file=/tmp/logs.img,if=virtio -net none -serial none -parallel none -usb
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0 -drive file=/tmp/data.img,if=virtio -drive file=/tmp/logs.img,if=virtio -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-disk-xenvbd.args

-LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0,boot=on -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0 -drive file=/tmp/data.img,if=xen,index=0 -drive file=/tmp/logs.img,if=xen,index=6 -net none -serial none -parallel none -usb
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0 -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0 -drive file=/tmp/data.img,if=xen,index=0 -drive file=/tmp/logs.img,if=xen,index=6 -net none -serial none -parallel none -usb