Deprecate and hide submit command

[asvetlov]

No description provided.

[codecov]

Codecov Report

Merging #1602 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1602   +/-   ##
=======================================
  Coverage   76.14%   76.14%           
=======================================
  Files          57       57           
  Lines        8475     8475           
  Branches     1387     1387           
=======================================
  Hits         6453     6453           
  Misses       1821     1821           
  Partials      201      201           

Flag	Coverage Δ
#unit	76.14% <100.00%> (ø)

Impacted Files	Coverage Δ
neuromation/cli/job.py	53.11% <100.00%> (ø)

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