Add system-level dependencies required for `bundle install`,
specifically the nokogiri gem compile.
Change-Id: Id3e56286fb3f170139d97f9f2638e3dd88628d3d
Signed-off-by: Daniel Farrell <dfarrell@redhat.com>
installing them easy.
```
-[~/puppet-opendaylight]$ sudo yum install -y rubygems ruby-devel gcc-c++ zlib-devel patch
+[~/puppet-opendaylight]$ sudo yum install -y rubygems ruby-devel gcc-c++ zlib-devel \
+ patch redhat-rpm-config make
[~/puppet-opendaylight]$ gem install bundler
[~/puppet-opendaylight]$ bundle install
[~/puppet-opendaylight]$ bundle update