rename all migrations to 1.x

db/migrations/1.138_create_tags_for_messaging.php

db/migrations/1.139_step00272_tours.php

db/migrations/1.13_remove_fields_from_extermine.php

db/migrations/1.140_tic4450_archiv_protected_files.php

db/migrations/1.141_tic4454_roomrequest_options.php

db/migrations/1.142_tic4463_remove_stm.php

db/migrations/1.143_step00249_my_courses_config.php

db/migrations/1.144_files.php

db/migrations/1.145_tic4491_help_content.php

db/migrations/1.146_step_00253_startseite.php

db/migrations/1.148_tic_4520_sem_tree_display.php

db/migrations/1.14_step_00123_admission2.php

db/migrations/1.150_help_tours_and_content.php

db/migrations/1.151_add_automatic_updates_to_plugins.php

db/migrations/1.152_tic_5117_course_member_admission.php

db/migrations/1.153_tic_4163_add_studip_shortname.php

db/migrations/1.154_recalculate_score.php

db/migrations/1.155_tic_5170_clean_up.php

db/migrations/1.156_tic_5204_add_datafield_type.php

db/migrations/1.157_contact_rework.php