* Default disk allocation may not use entire disk space.
  To prevent this, before deploying, check that you do not
  have unallocated disk space by going to "Nodes", selecting
  a node and clicking "Configure Disks".
  See `LP1490597 <https://bugs.launchpad.net/bugs/1490597>`_.

Add disk allocation issue to relnotes
Add disk allocation issue to relnotes

Change-Id: Ib2188fd784f5586a577f4b4737fef37b174f8be5
Related-Bug:#1490597
