refactoring name of migration to 20.03

migration/20.03/2003-postScript.sql

migration/20.03/2003.sql

migration/20.03/exportCases.php

migration/20.03/exportCustomFields.php

migration/20.03/exportFileplans.php

migration/20.03/exportFolders.php

migration/20.03/migrate.sh

migration/20.03/migrateCategories.php

migration/20.03/migrateContacts.php

migration/20.03/migrateCustomFields.php

migration/20.03/migrateCustomValues.php

migration/20.03/migrateExtensions.php

migration/20.03/migrateFileplans.php

migration/20.03/migrateFolders.php

migration/20.03/migrateFullText.php

migration/20.03/migrateIndexing.php

migration/20.03/migrateLinkedResources.php

migration/20.03/migrateListTemplates.php

migration/20.03/migrateM2MConfiguration.php

migration/20.03/migrateMenuEntities.php