fixing problem that I introduced earlier with ctl files not being loaded when package is installed from install.xml file and the the proc apm_packages_full_install. The problem was that no data model files were provided and the proc apm_data_model_scripts_find was used to provide the default. However, that proc would not return ctl files. I therefore changed it to do so and removed the proc apm_ctl_files_find that we no longer need
fixing upgrade bug related to .ctl (ctl_file) files. First of all, don't offer ctl files when upgrading (ok, we should make this possible if we need it). Second of all, use the ctl file selections the user actually made when choosing files to source (in proc apm_package_install_data_model)