Hash randomization test failures

[Dominic Hargreaves <dom@earth.li>]

The following bugs are almost certainly caused by tests broken by
hash randomisation: they don't represent functional failures in the
software, and doesn't always cause FTBFS. In this sense, my view is that
like other sporadic build failures, they can be downgraded to important.
Does this sound reasonable to others?

#711428 libcgi-application-plugin-authentication-perl
#711436 libdbix-abstract-perl
#711444 libgraph-readwrite-perl
#711446 libgraph-writer-graphviz-perl
#711604 libmime-lite-html-perl
#711614 libscriptalicious-perl
#711615 libsearch-estraier-perl
#720018 libhtml-wikiconverter-moinmoin-perl
#720271 libnet-jabber-perl

Cheers,
Dominic.