Add incident features

[alejgh]

Closes #18 Closes #19

Quick summary of changes:

• Incidents now have a relationship to a new AgentInfo class, which stores the login data of the agent (username, password and kind).
• Added a new Serializer and Deserializer to the Incident class, so we can customize the conversions between JSON and Incident in the controllers and the kafka message.
• Included JaCoCo dependency to activate the code coverage tool.

I decided to avoid including a operator class for now. I think just sending the email/username of the operator through the kafka stream to the dashboard will be enough for now.

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@0744582). Click here to learn what that means. The diff coverage is 61.45%.

@@            Coverage Diff            @@
##             master      #20   +/-   ##
=========================================
  Coverage          ?   63.39%           
  Complexity        ?       77           
=========================================
  Files             ?       19           
  Lines             ?      306           
  Branches          ?       29           
=========================================
  Hits              ?      194           
  Misses            ?      102           
  Partials          ?       10

Impacted Files	Coverage Δ	Complexity Δ
...ava/com/uniovi/main/InciManagerI2bApplication.java	33.33% <ø> (ø)	1 <0> (?)
src/main/java/com/uniovi/json/JSONHelper.java	100% <ø> (ø)	4 <0> (?)
...rc/main/java/com/uniovi/services/KafkaService.java	13.33% <0%> (ø)	2 <0> (?)
...a/com/uniovi/services/InsertSampleDataService.java	75% <100%> (ø)	2 <1> (?)
...ain/java/com/uniovi/json/IncidentDeserializer.java	100% <100%> (ø)	4 <4> (?)
.../main/java/com/uniovi/json/IncidentJSONModule.java	100% <100%> (ø)	1 <1> (?)
...ava/com/uniovi/controllers/IncidentController.java	100% <100%> (ø)	3 <2> (?)
...a/com/uniovi/util/IncidentPropertiesConverter.java	100% <100%> (ø)	3 <0> (?)
...c/main/java/com/uniovi/entities/IncidentState.java	100% <100%> (ø)	1 <1> (?)
.../main/java/com/uniovi/json/IncidentSerializer.java	100% <100%> (ø)	5 <5> (?)
... and 5 more

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