Validate the info.xml against the appstore schema file

core/Command/App/CheckCode.php

core/register_command.php

lib/private/App/AppManager.php

lib/private/App/CodeChecker/InfoChecker.php

resources/app-info-shipped.xsd

resources/app-info.xsd

tests/apps/testapp-version/appinfo/version

tests/apps/testapp_dependency_missing/appinfo/info.xml

tests/apps/testapp_infoxml/appinfo/info.xml

tests/apps/testapp_name_missing/appinfo/info.xml

tests/apps/testapp_version/appinfo/info.xml

tests/lib/App/CodeChecker/InfoCheckerTest.php