Recommended update for yast2, yast2-packager, yast2-pkg-bindings

This update for yast2, yast2-packager, yast2-pkg-bindings contains the following fixes:

Changes in yast2:
- Do not start an UI while evaluating current language settings. (bsc#1173133)
- Improve actions to stop and start a system service. (bsc#1162514)

Changes in yast2-pkg-bindings:
- Extensions to handle raw repository name. (bsc#1172477)

Changes in yast2-packager:
- Handle variable expansion in repository name. (bsc#1172477)

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Fixed bugs
bnc#1172477
When adding a new repository, yast replaces ${releasever} by the current release wherever it appears in repository names in /etc/zypp/repos.d/*.repo
bnc#1162514
iscsi session is not connected after successful connection via yast2 iscsi-client
bnc#1173133
L3: Abnormal termination of "yast2 ayast_setup" command - The curses interface does not load
Selected Binaries
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