rename all migrations to 1.x

db/migrations/1.158_step_00283_calendar_sorm.php

db/migrations/1.159_step_00275_plus.php

db/migrations/1.15_step_00129_email_restriction.php

db/migrations/1.160_step_00283_update_calendar_settings.php

db/migrations/1.161_step_00284_help_editor.php

db/migrations/1.162_step_00283_calendar_user.php

db/migrations/1.163_transfer_calpermission.php

db/migrations/1.164_help_tours_en.php

db/migrations/1.166_add_cache_operations_table.php

db/migrations/1.167_tic5661_setup_cronjob.php

db/migrations/1.168_tic5661_add_config.php

db/migrations/1.16_step_00126_embedding_flash_movies.php

db/migrations/1.170_step_00286_coursewizard.php

db/migrations/1.171_open_personal_file_areas.php

db/migrations/1.172_tic_5961_add_config_default_sem.php

...igrations/1.173_biest5982_fix_resources_objects_level.php

db/migrations/1.174_tic_6018_clean_news.php

db/migrations/1.175_biest6024_fix_help_tours_en.php

db/migrations/1.176_limit_mailqueue.php

db/migrations/1.177_tic5415_plugin_assets.php