Speed up CLI providers by using Rjb - Ruby Java Bridge and JBoss command line API

[cardil]

The idea is to use native Java gateway to JBoss CLI instead of spawning command line processes separately. In theory this should greatly increase the speed of evaluating the catalog.

Example of using command line API here: https://developer.jboss.org/wiki/JBossAS7Command-linePublicAPI
RJB Homepage: http://www.artonx.org/collabo/backyard/?RubyJavaBridge

Sample Ruby code (will be delivered):

require 'rjb'
Rjb::load(classpath = '/usr/lib/wildfly-8.2.0.Final/bin/client/jboss-cli-client.jar')

CommandContext = Rjb::import('CommandContext')
# [..]

Scope of change:

• puppet class jboss::plugins::rjb that will be included by default, and will install rjb gem into system (should be compatibile w Puppet OSS and Enterprise)
• abstract provider code changes, implementing 2 strategies: process, rjb and using rjb if it is available and not specified explicitly by user.
• unit and acceptance tests

After dropping support for Puppet 2.x, provider code can use features for providers