Automatic update for libdnf-0.48.0-1.eln103.

Changelog

* Tue Jun  2 2020 Nicola Sella <nsella@redhat.com> - 0.48.0-1
- Update to 0.48.0
- swdb: Catch only SQLite3 exceptions and simplify the messages
- MergedTransaction list multiple comments (RhBug:1773679)
- Modify CMake to pull *.po files from weblate
- Optimize DependencyContainer creation from an existing queue
- fix a memory leak in dnf_package_get_requires()
- Fix memory leaks on g_build_filename()
- Fix memory leak in dnf_context_setup()
- Add `hy_goal_favor` and `hy_goal_disfavor`
- Define a cleanup function for `DnfPackageSet`
- dnf-repo: fix dnf_repo_get_public_keys double-free
- Do not cache RPMDB
- Use single-quotes around string literals used in SQL statements
- SQLite3: Do not close the database if it wasn't opened (RhBug:1761976)
- Don't create a new history DB connection for in-memory DB
- transaction/Swdb: Use a single logger variable in constructor
- utils: Add a safe version of pathExists()
- swdb: Handle the case when pathExists() fails on e.g. permission
- Repo: prepend "file://" if a local path is used as baseurl
- Move urlEncode() to utils
- utils: Add 'exclude' argument to urlEncode()
- Encode package URL for downloading through librepo (RhBug:1817130)
- Replace std::runtime_error with libdnf::RepoError
- Fixes and error handling improvements of the File class
- [context] Use ConfigRepo for gpgkey and baseurl (RhBug:1807864)
- [context] support "priority" option in .repo config file (RhBug:1797265)