v0.4.31

Added

• allow to specify pwd in secexec (#1901).
  Also the usage of "secexec" has been slightly changed: now the executable and
  its arguments must be specified after "--".
  For example: secexec /etc/secexec -- /bin/ls -lith.
• watch for keystore in sysinit.

Fixed

• more nvidia related .so files for volumes (#1907).
  Found out that we're skipping a lot of useful nvidia's .so files.
  This PR adds all of them to the docker volume.
  Based on the content of NVIDIA-Linux-x86_64-440.82.
  To keep the list up-to-date in the future:
  1. download the latest version on drivers;
  2. unpack them without installing: "./NVIDIA-Linux-x86_64-XXX.YY.run
     --extract-only";
  3. list .so and update the list in "insonmnia/worker/gpu/nvidia_tuner.go";
     Don't forget to remove versions and .0 from file names;
  4. ???
  5. Congratulation, you're awesome open-source contributor;
• dwh tests (#1908).
  This PR fixes behavior with dwh test suite:
  • add required for run "POSTGRES_PASSWORD" environment
  • returns an error when Postgres not started any times, not null
  • format touched file imports
• check for mount required before mounting.
• weaken errors while constructing secsh banner.
• allow to start QOS without secsh.
• traverse children while looking for a device (#1898).