Recommended update for yast2-registration

This update for yast2-registration fixes the following issue:

_ Update from version 4.1.25 to 4.1.26
Decline/refuse of an add-on license means canceling all add-ons. (bsc#1169577)

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

Fixed bugs
bnc#1169577
[Product Registration] Adding (3rd party) Repositories proceeds although EULA not accepted
Selected Binaries
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