Add namespace agrs for deployment and allocations endpoints

[nikita-b]

1. Added support for namespace arguments for deployment and allocations endpoints.
2. Added support for Python 3.10.
3. Upgrade requests library (support 3.10 Python). This version also doesn't support Python 3.5. The latest version of lib doesn't support even 2.7/3.6 and I'm not sure about your plans for support these versions.

[jonathanrcross]

Hi @nikita-b, thanks so much for the PR! I brought down this branch locally and to run tests and saw similar failed test cases. If you want to run tests locally you can do the following:

#run nomad as server and agent, you will need to kill/restart after running the test suite
./nomad agent -dev -node pynomad1 --acl-enabled

# only need to run this once
nomad run -output example.nomad > example.json

NOMAD_IP=127.0.0.1 NOMAD_VERSION=1.3.5 py.test --cov=nomad --cov-report=term-missing --runxfail tests/

test-results.txt

[nikita-b]

@jonathanrcross Yep, my bad. I fixed. Could you recheck pls?

[codecov-commenter]

Codecov Report

Merging #133 (1796a61) into master (1cc1077) will increase coverage by 0.00%. The diff coverage is 93.06%.

@@           Coverage Diff           @@
##           master     #133   +/-   ##
=======================================
  Coverage   90.61%   90.61%           
=======================================
  Files          26       27    +1     
  Lines        1065     1129   +64     
=======================================
+ Hits          965     1023   +58     
- Misses        100      106    +6     

Impacted Files	Coverage Δ
nomad/api/base.py	96.55% <80.00%> (-1.04%)	:arrow_down:
nomad/api/event.py	86.66% <86.66%> (ø)
nomad/__init__.py	98.29% <100.00%> (+0.06%)	:arrow_up:
nomad/api/__init__.py	100.00% <100.00%> (ø)
nomad/api/allocations.py	100.00% <100.00%> (ø)
nomad/api/deployments.py	90.24% <100.00%> (+0.50%)	:arrow_up:
nomad/api/exceptions.py	100.00% <100.00%> (ø)
nomad/api/job.py	94.59% <100.00%> (+0.22%)	:arrow_up:
nomad/api/jobs.py	90.00% <100.00%> (+0.41%)	:arrow_up:
nomad/api/agent.py	92.85% <0.00%> (-7.15%)	:arrow_down:
... and 2 more

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[nikita-b]

@jonathanrcross @jrxFive Could you review/merge, pls?