This update fixes the following issues:

POS_Image-Graphical7:

- Add plymouth-plugin-label-ft package to all *7 templates and set
them to be of SLE15SP2 version
- Add optional dracut-wireless comment section and move wpa_suplicant
there

POS_Image-JeOS7:

- Add plymouth-plugin-label-ft package to all *7 templates and set
them to be of SLE15SP2 version
- Add optional dracut-wireless comment section and move wpa_suplicant
there

dracut-saltboot:

- Use automatic RAID assembly only in the first phase before
start of salt

dracut-wireless:

- Make sure ifup is scheduled (bsc#1173149)

golang-github-prometheus-prometheus:

- Add support for Prometheus exporters proxy

mgr-osad:

- Move uyuni-base-common dependency from mgr-osad to mgr-osa-dispatcher
(bsc#1174405)

spacecmd:

- Fix softwarechannel update for vendor channels (bsc#1172709)
- Fix escaping of package names (bsc#1171281)

spacewalk-koan:

- Use the 4.1 image to fix tests

suseRegisterInfo:

- Enhance RedHat product detection for CentOS and OracleLinux (bsc#1173584)

uyuni-common-libs:

- Fix issues importing RPM packages with long RPM headers (bsc#1174965)

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