FIX: Update logging levels in enable_debug_mode

[effigies]

Fixes #1169

Changes proposed in this pull request

• Update logging levels in enable_debug_mode
• Add a test

[satra]

i don't think this was really a bug. if we treat it as such (and i am fine with the change) we should update this as well:

http://nipype.readthedocs.io/en/latest/users/config_file.html#debug-configuration

[effigies]

It does seem weird to enable_debug_mode and only change the config without changing the log levels the config refers to.

That said, if utils_level wasn't intended to be part of it, I'm okay with removing that. That may be too noisy. Will update the docs.

[codecov-io]

Codecov Report

Merging #2595 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2595      +/-   ##
==========================================
+ Coverage   67.62%   67.63%   +<.01%     
==========================================
  Files         336      336              
  Lines       42711    42714       +3     
  Branches     5278     5278              
==========================================
+ Hits        28883    28889       +6     
+ Misses      13151    13148       -3     
  Partials      677      677

Flag	Coverage Δ
#smoketests	50.77% <100%> (+0.02%)	⬆️
#unittests	65.11% <100%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
nipype/utils/config.py	66.84% <100%> (+0.54%)	⬆️
nipype/utils/profiler.py	43.1% <0%> (-1.15%)	⬇️
nipype/utils/logger.py	87.3% <0%> (+7.93%)	⬆️

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[satra]

also this docs: http://nipype.readthedocs.io/en/latest/users/debug.html

so we did have proper instructions for debug mode.

i would use this opportunity to clean up and make debug mode as useful as possible. so go ahead with your changes.

[effigies]

Any further comments? Hoping to merge these last four PRs in batch when @mgxd's tests pass.

[satra]

lgtm