This update for the Software Update Stack fixes the following issues:

libsolv:

- Simplify handling of pseudo package updates. (bsc#967006)
- Improve speed of rpmmd metadata parsing.

libzypp:

- Fix credential file parser losing entries with known URL but different user name. (bsc#933760)
- RepoManager: Allow extraction of multiple baseurls for service repositories. (bsc#964932)
- Fix service metadata TTL default value. (bsc#967828)
- DiskUsageCounter: Limit estimated waste per file. (bsc#974275)
- Use PluginExecutor for commit- and system-hooks. (bnc#971637)
- Set libsolv-devel >= 0.6.19 as BuildRequires. (bnc#971018)

zypper:

- Fix testing for '-- download*' options. (bsc#956480)
- Update sle-zypper-po.tar.bz2. (bsc#972768)

This update was imported from the SUSE:SLE-12-SP1:Update update project.