Fix device management lifecycle APPS message processing

[Coduz]

Fixed the processing of the APP message from the DeviceLifecycleService.

Related Issue
None

Description of the solution adopted
On the processing of the APPS message from the service, the Device info update was missing and only the lastEvent was updated.

Now the service stores correctly updated device infos from the APPS message.

Screenshots
None

Any side note on the changes made
I've also performed a small improvement of the code

[codecov]

Codecov Report

Merging #2780 into develop will increase coverage by 0.45%.
The diff coverage is 74.19%.

@@             Coverage Diff              @@
##             develop   #2780      +/-   ##
============================================
+ Coverage      57.04%   57.5%   +0.45%     
- Complexity      3120    3166      +46     
============================================
  Files           1074    1074              
  Lines          30502   30474      -28     
  Branches        2427    2427              
============================================
+ Hits           17400   17523     +123     
+ Misses         11940   11788     -152     
- Partials        1162    1163       +1

Impacted Files	Coverage Δ	Complexity Δ
...lifecycle/internal/DeviceLifeCycleServiceImpl.java	79.16% <74.19%> (+16.26%)	10 <6> (+3)	⬆️
...egistry/event/internal/DeviceEventServiceImpl.java	80.35% <0%> (+3.57%)	14% <0%> (+1%)	⬆️
...a/org/eclipse/kapua/transport/mqtt/MqttClient.java	67.94% <0%> (+6.41%)	14% <0%> (ø)	⬇️
...apua/job/engine/jbatch/JobEngineServiceJbatch.java	48.14% <0%> (+8.33%)	7% <0%> (+1%)	⬆️
...ransport/mqtt/pooling/PooledMqttClientFactory.java	90% <0%> (+10%)	6% <0%> (ø)	⬇️
...ne/queue/jbatch/QueuedJobExecutionFactoryImpl.java	37.5% <0%> (+12.5%)	3% <0%> (+1%)	⬆️
...e/kapua/job/engine/jbatch/driver/JbatchDriver.java	68.9% <0%> (+12.6%)	20% <0%> (+6%)	⬆️
...a/job/engine/jbatch/listener/KapuaJobListener.java	90.27% <0%> (+15.97%)	28% <0%> (+7%)	⬆️
...ne/queue/jbatch/QueuedJobExecutionServiceImpl.java	50% <0%> (+25%)	8% <0%> (+4%)	⬆️
...ipse/kapua/transport/mqtt/MqttClientException.java	28.57% <0%> (+28.57%)	1% <0%> (+1%)	⬆️
... and 5 more

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[Coduz]

Build before rebase on latest develop passed: https://travis-ci.org/eclipse/kapua/builds/614985053