Add texlive-epstopdf to yum package list

Add the texlive-epstopdf package to package list, this will  also bring
in texlive-epstopdf-bin with the requested epstopdf binary.

From john 20140421124923:
I need the 'epstopdf' utility on the login machines.  This is necessary
because I have a lot of DocBook documents that have LaTeX equations in
them, and the Makefiles build PDFs for the PDF rendering.