Changed default for CodeSniffer usages to yes
Removed double [Y/n] from composer configurator
Changed default for CPD exlude patters to no (consistent)
Strip possible trailing comma from build deps

Due to the fact that there is no fixed first or last build dependency
there is no good way to set the comma's as separators. By assigning
everything to a twig var, and using that with trim, we solve the issue
of a possible trailing comma if behat is not enabled
Moving version from injected string to constant