Streamline and Automate Access

[gordonwatts]

• If you end with a Select statement or similar, assume the backend can handle it
• Automatically determine the proper way to get data driven by ServiceXDataset knowledge (rather than something determined coder).
• Removed some tests for things that just do never happen, so no need to protect
• Split the CI jobs in two - first flake8, etc., and then do the pytesting and coverage

[codecov-commenter]

Codecov Report

Merging #29 (1371cf4) into master (9331fe0) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #29   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines           80        79    -1     
=========================================
- Hits            80        79    -1     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
func_adl_servicex/ServiceX.py	100.00% <100.00%> (ø)

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