Upgrade to Vert.x 3.9.1

[malaskowski]

Description

Upgrade Vert.x to 3.9.1

Motivation and Context

Knotx/knotx-dependencies#48

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have read the CONTRIBUTING document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

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I hereby agree to the terms of the Knot.x Contributor License Agreement.

[codecov]

Codecov Report

Merging #170 into master will decrease coverage by 0.04%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #170      +/-   ##
============================================
- Coverage     90.84%   90.80%   -0.05%     
  Complexity     1619     1619              
============================================
  Files           153      153              
  Lines          6780     6783       +3     
  Branches        183      183              
============================================
  Hits           6159     6159              
- Misses          527      530       +3     
  Partials         94       94              

Impacted Files	Coverage Δ	Complexity Δ
...nts/action/library/InMemoryCacheActionFactory.java	94.11% <100.00%> (ø)	15.00 <0.00> (ø)
...gments/action/library/InlineBodyActionFactory.java	95.83% <100.00%> (ø)	7.00 <0.00> (ø)
...nts/action/library/InlinePayloadActionFactory.java	96.15% <100.00%> (ø)	8.00 <0.00> (ø)
...nts/action/library/PayloadToBodyActionFactory.java	85.00% <100.00%> (ø)	9.00 <0.00> (ø)
...gments/action/library/cb/CircuitBreakerAction.java	100.00% <100.00%> (ø)	14.00 <0.00> (ø)
...notx/fragments/action/library/http/HttpAction.java	95.65% <100.00%> (ø)	12.00 <1.00> (ø)
...action/library/InMemoryCacheActionFactoryTest.java	90.75% <100.00%> (ø)	33.00 <0.00> (ø)
...nts/action/library/cb/CircuitBreakerDoActions.java	97.36% <100.00%> (ø)	11.00 <0.00> (ø)
...logging/InMemoryCacheActionFactoryLoggingTest.java	93.63% <100.00%> (ø)	30.00 <0.00> (ø)
...ts/task/engine/FragmentsEngineConcurrencyTest.java	88.88% <100.00%> (ø)	9.00 <0.00> (ø)
... and 7 more

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