Fixed Omnibus Installation for RHEL#60

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Azrael808 wants to merge 3 commits intofnichol:masterfrom

Azrael808:fix_omnibus_rhel

Commits on Jan 14, 2015

Updated a string/name used to check for the location of an installed Chef server.
Azrael808
committed
Using a variable in conjunction with the to correctly reconfigure or test server before binary symlinks have been created.
Azrael808
committed
Ensuring that patch is installed on EL before attempting to patch knife.
Azrael808
committed