Add some cleanup to utils

[mohabusama]

Add some cleanup to utils

• Add support for trace_flask

[codecov[bot]]

Codecov Report

Merging #11 into master will increase coverage by 1.13%. The diff coverage is 99.27%.

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
+ Coverage   96.62%   97.75%   +1.13%     
==========================================
  Files           5        6       +1     
  Lines         148      223      +75     
==========================================
+ Hits          143      218      +75     
  Misses          5        5

Impacted Files	Coverage Δ
opentracing_utils/libs/_requests.py	100% <100%> (ø)
opentracing_utils/libs/_flask.py	100% <100%> (ø)
opentracing_utils/decorators.py	100% <100%> (ø)	:arrow_up:
opentracing_utils/__init__.py	100% <100%> (ø)	:arrow_up:
opentracing_utils/span.py	100% <100%> (ø)	:arrow_up:
opentracing_utils/tracers.py	86.48% <94.44%> (+7.31%)	:arrow_up:

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[mohabusama]

Tests need to be updated for trace_flask

[vetinari]

:+1:

[mohabusama]

👍