[BZ 1141792] Remove all the references to the old rhq-encode-password.

(cherry picked from commit 535696e618a3dd6b62989b4e9cbea0b405fd5251)
Signed-off-by: Stefan Negrea <snegrea@redhat.com>
[BZ 1141792] For backwards compatibility add the old script name back with a huge deprecation warning. The script will just run the newer functionality but the file name is kept intact.

(cherry picked from commit daddb445f25cb02b6cdb1d7fe6c61afbcff669ca)
Signed-off-by: Stefan Negrea <snegrea@redhat.com>