Requirements to run release_psg script:
--------------------------------------

- prepare_release script must be in PATH
- h2load utility must be in PATH
- python 3 higher than 3.3 must be used
- the python 'psutil' and 'grid-deployment-info' modules must be available.
  It may be more convenient to create a virtual environment and install modules as
  $ pip install psutil
  $ pip install grid-deployment-info

Return value:
------------
0    -> the required action(s) completed successfully
!= 0 -> there were errors

Artefacts:
---------

- all the script artefacts are stored in <curret working dir>/PSG-X.X.X
  directory

  'build' action:
  -- two subdirectories .../PSG-X.X.X/prepare_release....conf.pubseq_gateway-0.0.0
                        .../PSG-X.X.X/prepare_release....build.pubseq_gateway-0.0.0

  'functional_test' action:
  -- .../PSG-X.X.X/pubseq_gateway-ut-http.log
  -- .../PSG-X.X.X/ut-http.log
  -- .../PSG-X.X.X/pubseq_gateway-ut-https.log
  -- .../PSG-X.X.X/ut-https.log
  -- .../PSG-X.X.X/pubseq_gateway-integration-test.log
  -- .../PSG-X.X.X/integration-test.log

  'stability_test' action:
  -- ../PSG-X.X.X/pubseq_gateway-drop-client-http.log

  'memcheck' action:
  -- .../PSG-X.X.X/pubseq_gateway-memcheck-ut-http.log
  -- .../PSG-X.X.X/memcheck-ut-http.log
  -- .../PSG-X.X.X/pubseq_gateway-memcheck-ut-https.log
  -- .../PSG-X.X.X/memcheck-ut-https.log
  -- .../PSG-X.X.X/pubseq_gateway-memcheck-integration-test.log
  -- .../PSG-X.X.X/memcheck-integration-test.log

  'stress_test' action:
  -- .../PSG-X.X.X/pubseq_gateway-stress-http.log
  -- .../PSG-X.X.X/stress-http.log
  -- .../PSG-X.X.X/pubseq_gateway-stress-https.log
  -- .../PSG-X.X.X/stress-https.log

  'compare' action:
  -- .../PSG-X.X.X/pubseq_gateway-compare-Y.Y.Y.log
  -- .../PSG-X.X.X/pubseq_gateway-compare.log
  -- .../PSG-X.X.X/perf-vY.Y.Y-vs-vX.X.X.txt

  'perf_test' action:
  -- .../PSG-X.X.X/???

  'archive' action:
  -- archived release at /am/ncbiapdata/releases/pubseq_gateway/...