Misc: Workaround deprecated Gem::SourceIndex#add_spec (required to work with rubygems 1.8)

Signed-off-by: Tim Serong <tserong@suse.com>
Misc: Force UTF-8 encoding to fix ActionView::TemplateError when loading main status page (bnc#800338)

Signed-off-by: Tim Serong <tserong@suse.com>