Fix up the packer-openstack-hpc-image/ansible to get /share/apps (symlink) location in place

The tasks in cheaha.node ansible role for packer-openstack-hpc-image doesn't create the /share/apps->/data/rc/apps symlink properly. This issue is caused by

1. NFS share is mounted on to mount point /data/rc/apps before the mount point exists.
2. Reversed src and dest in ln command.