changed code for memory burin vm-bytes, 75 to 75%
changed code for memory burin vm-bytes, 75 to 75%

Signed-off-by: Bernd Mueller <92077450b9044303d92f5e65cc1df76bc62504ed@b1-systems.de>
Change-Id: I05b03ff3678ee98c548f63d0df5adf4eebffe208

openstack/ironic,openstack/ironic