Multi-homed tomcat and many other fixes

After a while, the development of chef-alfresco restarted; this time, we're aiming mostly at centos platform, though the entire code should be compatible also with Ubuntu distro.

The main additions are:

• Tomcat multi-homed installation, which - by default - creates 3 instances: tomcat-alfresco, tomcat-share, tomcat-solr
• Rsyslog configuration for all log files generated
• Using solr4 by default and upgrading to alfresco 5.0.d (also tested with 5.0.1 Enterprise)
• Added Records Management component
• Added AOS integration
• Added nginx and haproxy configuration, including SSL certificate installation
• Snort recipe improvements, to allow overriding rule file sources
• Chef client configuration, to run a small sub-set of Chef logic on a running server, keeping changes to the minimum and restarting services accordingly, only when strictly needed