[BUGFIX] Use install instead of upgrade for the xdebug package

recipes/default.rb

@@ -23,7 +23,7 @@
 # THE SOFTWARE.
 
 package 'php' + node['ubuntu_base']['php_version'] + '-xdebug' do
-	action 'upgrade'
+	action :install
 end
 
 template '/etc/php/' + node['ubuntu_base']['php_version'] + '/mods-available/xdebug.ini' do