Recommended update for chrony

This update for chrony fixes the following issues:

- Read runtime servers from /var/run/netconfig/chrony.servers (bsc#1099272, bsc#1161119)
- Move chrony-helper to /usr/lib/chrony/helper, because there should be no executables in /usr/share.
- Add chrony-pool-suse and chrony-pool-openSUSE subpackages that preconfigure chrony
to use NTP servers from the respective pools for SUSE and openSUSE. (bsc#1156884, SLE-11424)
- Add chrony-pool-empty to still allow installing chrony without preconfigured servers.

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

Fixed bugs
bnc#1161119
[RPi3] [Compute module 3+] Clock is wrong while chronyd is running
bnc#1099272
DHCP/netconfig does not set chrony time servers, still uses ntpq
bnc#1156884
[Build2.73] chronyd is missing sources
Selected Binaries
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