[opennebula] ruby 1.8.7: add gem require_relativ
[opennebula] fix link in readme
Revert "[opennebula] ruby 1.8.7: add gem require_relativ"

This reverts commit 45e259e3d623d2300820c060fbd341616fe65ed6.
[opennebula] VNC: require local file compatible to ruby 1.8.7