Bug 1216116

## Test steps:

1) We first created qcow file by scc by job https://openqa.suse.de/tests/12423401 with iso SLE-15-SP3-Online-x86_64-GM-Media1.iso by SCC and generated qcow file with kernel 5.3.18-150300.59.106 
https://openqa.suse.de/tests/12423401

2) boot from the upper qcow file and do patch_sle with ltss addon, which resulted kernel updated to 5.3.18-150300.59.133


3) reboot and system panic "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)"
https://openqa.suse.de/tests/12423445#step/patch_sle/79

## error message:
~~
[    1.068152] PM:   Magic number: 11:807:975
[    1.069483] List of all partitions:
[    1.070672] No filesystem could mount root, tried: 
[    1.070673] 
[    1.072898] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    1.074839] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.3.18-150300.59.133-default #1 SLE15-SP3
[    1.076841] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552c-rebuilt.opensuse.org 04/01/2014
[    1.079893] Call Trace:
[    1.080895]  dump_stack+0x66/0x8b
[    1.082027]  panic+0xfe/0x2e3
[    1.083075]  mount_block_root+0x277/0x2df
[    1.084283]  ? set_debug_rodata+0x11/0x11
[    1.085480]  prepare_namespace+0x130/0x166
[    1.086747]  kernel_init_freeable+0x273/0x29f
[    1.087993]  ? rest_init+0xb0/0xb0
[    1.089083]  kernel_init+0xa/0x110
[    1.090175]  ret_from_fork+0x35/0x40
[    1.091309] Kernel Offset: 0x2200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[    1.094087] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---
~~

## Observation

openQA test in scenario sle-15-SP3-Server-DVD-Updates-x86_64-sle_support_image_gnome_15sp3_basesys-srv-ltss-desk-dev_all_patterns_dev@64bit fails in
[patch_sle](https://openqa.suse.de/tests/12423445/modules/patch_sle/steps/79)

## Test suite description
The base test suite is used for job templates defined in YAML documents. It has no settings of its own.


## Reproducible

Fails since (at least) Build [GM](https://openqa.suse.de/tests/12331542)

## Further details
if we use an old kernel 5.3.18-59.37-default to 
5.3.18-150300.59.133-default, it will pass with the same settings 
https://openqa.suse.de/tests/12439237/