installation: disable SSLv2/SSLv3 in Apache config
installation: disable SSLv2/SSLv3 in Apache config

* Disables SSLv2 and SSLv3 in Apache configuration due to known
  vulnerabilities.  (closes #2515)

* Adds also SSLCipherSuite directive.

Signed-off-by: Tibor Simko <c7116e45300b163846dc01f3ed02116e3f8ef7a5@cern.ch>

tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio