Select addon product to install (bsc#1258187), refresh repos after registration (bsc#1259217)

[lslezak]

Problem

• https://bugzilla.suse.com/show_bug.cgi?id=1258187 - the sle-ha product is not installed after registering the SLES-HA extension
• https://bugzilla.suse.com/show_bug.cgi?id=1259217 - no packages are available after registration

Solution

• Select the product from the just registered extension to install, select products from all registered extensions when changing the configuration via API
• Refresh the repositories after registering a product

Testing

• Tested manually
• The sle-ha product is found (as the repository is refreshed) and is selected to install:

Log excerpt:

Selecting product sle-ha from repository SUSE_Linux_Enterprise_High_Availability_Extension_16.1_x86_64:SLE-Product-HA-16.1
[rust-bindings] Resetting status of all resolvables
Selecting products from service SUSE_Linux_Enterprise_High_Availability_Extension_16.1_x86_64
Selecting product sle-ha from repository SUSE_Linux_Enterprise_High_Availability_Extension_16.1_x86_64:SLE-Product-HA-16.1
Install only required packages: false
[zypp::solver] -------------- Calling SAT Solver -------------------
[zypp::solver] SATResolver::resolvePool()
[zypp::solver] SATResolver::solverInit()
[zypp::solver] Locked 0 installed items and 0 NOT installed items.
[zypp::solver] Install U_Th_(7787)sle-ha-release-16.1-160099.11.1.x86_64(SUSE_Linux_Enterprise_High_Availability_Extension_16.1_x86_64:SLE-Product-HA-16.1)
[zypp::solver] Install U_Th_(7790)product:sle-ha-16.1-0.x86_64(SUSE_Linux_Enterprise_High_Availability_Extension_16.1_x86_64:SLE-Product-HA-16.1)
[zypp::solver] Install U_Th_(7835)NetworkManager-1.54.3-160099.1.1.x86_64(SUSE_Linux_Enterprise_Server_16.1_x86_64:SLE-Product-SLES-16.1)

[lslezak]

This is the repository load fix, the rest is about selecting the add-on products. 😃