Recommended update for libzypp and zypper

This update for libzypp and zypper fixes the following issues:

- Fix blocking wait for finished child process (bsc#1109877)
- Fix conversion of string and glob to regex when compiling queries
(bsc#1099982, bsc#939392, bsc#556664)
- Always warn if no repos are defined, but don't return
ZYPPER_EXIT_NO_REPOS(6) in install commands (bsc#1109893)
- Switch global help format and fix bash-completion

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

Fixed bugs
bnc#1109893
Zypper shows no failure on package it cannot install
bnc#939392
zypper search ignores arguments with "+" (plus) characters
bnc#1109877
[Build 50.1] second stage stuck for more than an hour during installation
bnc#556664
zypper does not always find pattern devel_C_C++ with --match_exact
bnc#1099982
"zypper se" lists incorrectly with multiple packages when a "+" sign exist in package name
Selected Binaries
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