Feature/log time assert

[Hawk94]

Extend log_time decorator to handle logging from multiple different validators. Also align output from spectacles assert & spectacles sql commands:

[codecov]

Codecov Report

Merging #134 into master will increase coverage by 0.28%.
The diff coverage is 72.22%.

@@            Coverage Diff            @@
##           master    #134      +/-   ##
=========================================
+ Coverage   66.52%   66.8%   +0.28%     
=========================================
  Files           9       9              
  Lines         684     717      +33     
=========================================
+ Hits          455     479      +24     
- Misses        229     238       +9

Impacted Files	Coverage Δ
spectacles/validators.py	57.3% <0%> (-2%)	⬇️
spectacles/runner.py	47.36% <100%> (+6.19%)	⬆️
spectacles/utils.py	91.89% <100%> (+10.64%)	⬆️
spectacles/printer.py	74% <25%> (-4.27%)	⬇️

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[DylanBaker]

@Hawk94 Thanks for this! It looks good.

One thing I can't decide is if the time should be how long the whole process takes, or just the validate step. There's a bit of time spent building up the LookML project, that doesn't get included if we just wrap the validate function. @joshtemple Do you have an opinion on what it should be measuring?

[joshtemple]

This looks great @Hawk94! I think measuring validate is good enough. There isn't that much happening outside of that method except for instantiation of the client and branch checkout.

There's a bit of time spent building up the LookML project

This actually happens in the validate method, so we're covered here.

[joshtemple]

My mistake, @DylanBaker pointed out we should decorate the validate_* methods in the Runner class, not the validate methods of the Validators. I'm assuming that's a straightforward change and helps capture more of the runtime.