update descr for alfresco_version and change default to 5.0.x
update descr for alfresco_version and change default to 5.0.x

marsbard/puppet-alfresco,digcat/puppet-alfresco,marsbard/puppet-alfresco,digcat/puppet-alfresco,digcat/puppet-alfresco,digcat/puppet-alfresco,marsbard/puppet-alfresco,marsbard/puppet-alfresco,marsbard/puppet-alfresco,digcat/puppet-alfresco