[development] History - Correction of problems with the logger

[thiagodpf]

• Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

bug fix

• What is the current behavior? (You can also link to an open issue here)

• There were not many logs in the component;
• When the LOG_LEVEL environment variable was set to a minuscule value, there was a problem with the component initialization;
• When the environment variable LOG_LEVEL was initialized with the value INFO and later, if the admin wanted to change this value to DEBUG, the debug messages were not logged.

• What is the new behavior (if this is a feature change)?

• more logs have been added to the functions;
• env_var LOG_LEVEL value converted to uppercase;
• The error that occurred when trying to change the log level has been fixed (the level of the StreamHandler of the log was not being changed).

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

no

• Is there any issue related to this PR in other repository? (such as dojot/dojot)

dojot/dojot#1513
dojot/dojot#1515

• Other information:

I changed the server port in standalone mode to 8787 because port 8000 is commonly used by Kong in the dojot docker-compose, so to be able to run the component (in standalone mode for debug) together with the dojot, this change was necessary.

[codecov]

Codecov Report

Merging #85 into development will decrease coverage by 0.41%.
The diff coverage is 70.68%.

@@               Coverage Diff               @@
##           development      #85      +/-   ##
===============================================
- Coverage        73.44%   73.02%   -0.42%     
===============================================
  Files                7        7              
  Lines              418      456      +38     
===============================================
+ Hits               307      333      +26     
- Misses             111      123      +12     

Impacted Files	Coverage Δ
history/api/models.py	75.23% <69.64%> (-1.48%)	⬇️
history/app.py	76.92% <100.00%> (ø)
history/conf.py	100.00% <100.00%> (ø)

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