Admin guide: fix OpenNebula image creation instructions
Admin guide: fix OpenNebula image creation instructions

- The default image name is conpaas.img, not conpaasweb.img
- Executing "oneimage register conpaas.img" is wrong and makes the script go
  OOM. Added instructions for writing an image description file and properly
  register the image

git-svn-id: 2deb3340141ac69a26c0f89cf6cbd56f19c97dea@1733 ef35cc4a-2640-4bbf-98bc-65920db7d8ae

mihaisoloi/conpaas,mihaisoloi/conpaas,mihaisoloi/conpaas,mihaisoloi/conpaas,mihaisoloi/conpaas