MAGETWO-38202: Create skelton language uninstall command

- fixed message text

Author: Ivan Gavryshko

app/code/Magento/Translation/Console/Command/UninstallLanguageCommand.php

@@ -117,7 +117,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         foreach ($languages as $package) {
             if (!$this->validate($package)) {
-                $output->writeln("<info>Package $package is not a magento language and will be skipped.</info>");
+                $output->writeln("<info>Package $package is not a Magento language and will be skipped.</info>");
             } else {
                 if (sizeof($dependencies[$package]) > 0) {
                     $output->writeln("<info>Package $package has dependencies and will be skipped.</info>");