install graphviz on bugzilla role

Checking for             GraphViz (any)       not found
not a valid executable: /usr/bin/dot
checksetup.pl complete.

if it wants /usr/bin/dot then need this it where it's from

Depends: libc6 (>= 2.15), libcdt4, libcgraph5, libexpat1 (>= 1.95.8),
         libgd2-noxpm (>= 2.0.36~rc1~dfsg) | libgd2-xpm (>= 2.0.36~rc1~dfsg),
         libgraph4, libgvc5, libgvpr1, libx11-6, libxaw7, libxmu6, libxt6

but what about these:

libgraphviz-perl - Perl interface to the GraphViz graphing tool
libgv-perl - Perl bindings for graphviz
libgraph-easy-perl - Perl module to convert or render graphs
                    (as ASCII, HTML, SVG or via Graphviz)

Change-Id: I36a136458494844a1d433fb07945a9a4c342083d
Merge "install graphviz on bugzilla role" into production