Update Vagrantfile.erb.
Pull driver settings that are common across all platforms out to the
driver configuration section.
Update Erlang cookbook dependency so that CFLAGS can be set before
compiling on CentOS 6.5.
Update reference to Java cookbook

Now the Java cookbook uses Chef's cache directory to extract the Oracle
JDK archive instead of /tmp. Also, explicitly set root_path in
.kitchen.yml so that /tmp isn't used by Test Kitchen for its cache.