Fix Squiz.PHP.LowercasePHPFunctionsSniff detecting namespaced classes

Example: Db\Adapter\Pdo\Mysql gets detected as builtin function (mysql)
Merge branch 'patch-1' of https://github.com/maxgalbu/PHP_CodeSniffer
Unit test + changelog
PSR1 SideEffectsSniff now ignores methods named define()