rhevh7: remove symbol link from el6

rhevh7-install.ks and rhevh7-minimizer.ks should have
their own version of these files to be adapted as needed.
This patch removes the symbol links and add the files.

Change-Id: I3cdb202a2f8388242231ca282f7a469aa5ab7302
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>