leapp upgrade fails when LUKS devices are present even though TPM2 is used to decrypt them

Issue

• Trying to upgrade a system having LUKS devices bound to the TPM2 device, rebooting for the upgrade to occur drops to Emergency prompt due to not finding the LUKS devices, as shown in the example below

  Disk layout:

  # lsblk
  NAME                                            MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINT
  sr0                                              11:0    1 1024M  0 rom   
  vda                                             252:0    0   30G  0 disk  
  ├─vda1                                          252:1    0  200M  0 part  /boot/efi
  ├─vda2                                          252:2    0    1G  0 part  /boot
  └─vda3                                          252:3    0 28.8G  0 part  
    ├─rhel-root                                   253:0    0 14.8G  0 lvm   
    │ └─luks-522b7104-47c1-4300-b49a-f5603cddea77 253:2    0 14.8G  0 crypt /
    ├─rhel-swap                                   253:1    0    1G  0 lvm   
    │ └─luks-e983569c-1255-44dd-8201-6de51ca5385d 253:3    0 1008M  0 crypt [SWAP]
    ├─rhel-opt                                    253:4    0    1G  0 lvm   
    │ └─luks-aecc6a62-900f-4bf5-9808-33f54c76499b 253:11   0 1008M  0 crypt /opt
    ├─rhel-tmp                                    253:5    0    1G  0 lvm   
    │ └─luks-b8e94c2d-855e-43bf-9511-2d530dacfb51 253:15   0 1008M  0 crypt /tmp
    ├─rhel-var_tmp                                253:6    0    1G  0 lvm   
    │ └─luks-d3542a15-11ba-4e6e-85b8-ed646e3c8425 253:13   0 1008M  0 crypt /var/tmp
    ├─rhel-var_log_audit                          253:7    0    1G  0 lvm   
    │ └─luks-aab625bb-4f80-4f26-97be-10a28f75ffc9 253:10   0 1008M  0 crypt /var/log/audit
    ├─rhel-var_log                                253:8    0    1G  0 lvm   
    │ └─luks-c32cdc66-3697-416b-8563-3e0f677ab6fe 253:14   0 1008M  0 crypt /var/log
    └─rhel-var                                    253:9    0    8G  0 lvm   
      └─luks-da585fa3-1b96-4e27-bd1e-8e6bfd8b4000 253:12   0    8G  0 crypt /var
  

  Boot on RHEL-Upgrade-Initramfs entry:

  [   26.800888] /dev/mapper/luks-aecc6a62-900f-4bf5-9808-33f54c76499b: Can't lookup blockdev
  [   26.801568] /dev/mapper/luks-b8e94c2d-855e-43bf-9511-2d530dacfb51: Can't lookup blockdev
  [   26.698390] upgrade[1211]: mount: /opt: special device /dev/mapper/luks-aecc6a62-900f-4bf5-9808-33f54c76499b does not exist.
  [   26.802713] /dev/mapper/luks-da585fa3-1b96-4e27-bd1e-8e6bfd8b4000: Can't lookup blockdev
  [   26.699467] upgrade[1211]: mount: /tmp: special device /dev/mapper/luks-b8e94c2d-855e-43bf-9511-2d530dacfb51 does not exist.
  [   26.700544] upgrade[1211]: mount: /var: special device /dev/mapper/luks-da585fa3-1b96-4e27-bd1e-8e6bfd8b4000 does not exist.
  [   26.701150] upgrade[1211]: mount: /var/log: mount point does not exist.
  [   26.701516] upgrade[1211]: mount: /var/log/audit: mount point does not exist.
  [   26.701915] upgrade[1211]: mount: /var/tmp: mount point does not exist.
  [   26.921544] upgrade[1221]: Traceback (most recent call last):
  [   26.922029] upgrade[1221]:   File "/usr/bin/leapp", line 11, in <module>
  [   26.922439] upgrade[1221]:     load_entry_point('leapp==0.20.0', 'console_scripts', 'leapp')()
  [   26.922928] upgrade[1221]:   File "/usr/lib/python3.6/site-packages/leapp/cli/__init__.py", line 50, in main
  [   26.923455] upgrade[1221]:     with leapp_lock():
  [   26.923723] upgrade[1221]:   File "/usr/lib/python3.6/site-packages/leapp/utils/lock.py", line 73, in __enter__
  [   26.924305] upgrade[1221]:     self.fd = os.open(self.lockfile, os.O_CREAT | os.O_RDWR, 0o600)
  [   26.924794] upgrade[1221]: FileNotFoundError: [Errno 2] No such file or directory: '/var/run/leapp.pid'