Allow OMSA 7.2 to work with RHEL 6.4

Provide a patched version of /etc/init.d/dsm_sa_ipmi, waiting next OMSA release.
Merge pull request #26 from mremy/patch_an_omsa_init_script_for_rhel_6_4

Allow OMSA 7.2 to work with RHEL 6.4