Added Tests For Endpoint Service

[zanpizmoht]

Added tests for creating and editing Endpoints.

Signed-off-by: zanpizmoht zan.pizmoht@comtrade.com

Test scenarios for Endpoint service are added in this PR.

Related Issue
None

Description of the solution adopted
Test scenarios that are added in this PR are checking functionalities regarding Endpoints. All scenarios are added to EndpointServiceI9n.feature. Scenarios are testing if Endpoints are correctly created and edited. There are also two scenarios added for testing Endpoint in different accounts.

Screenshots
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Any side note on the changes made
@Coduz This PR has to be merged before PR #2808 which is still waiting for CQ. After this is merged, we will just rebase the #2808 and the CQ will not be needed any more, since the total lines count will be less than 1k.

[codecov]

Codecov Report

Merging #2881 into develop will decrease coverage by 0.11%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop    #2881      +/-   ##
=============================================
- Coverage      55.24%   55.12%   -0.12%     
+ Complexity      2363     2361       -2     
=============================================
  Files           1009     1009              
  Lines          21779    21779              
  Branches        1976     1976              
=============================================
- Hits           12031    12006      -25     
- Misses          8843     8868      +25     
  Partials         905      905

Impacted Files	Coverage Δ	Complexity Δ
...ore/plugin/authentication/AuthenticationLogic.java	67.5% <0%> (-17.5%)	0% <0%> (ø)
...pse/kapua/broker/core/pool/JmsProducerWrapper.java	50% <0%> (-15%)	0% <0%> (ø)
...nnection/internal/DeviceConnectionCreatorImpl.java	93.1% <0%> (-6.9%)	18% <0%> (-1%)
...ice/job/targets/internal/JobTargetServiceImpl.java	72.72% <0%> (-6.07%)	12% <0%> (-1%)
...stry/connection/internal/DeviceConnectionImpl.java	69.04% <0%> (-4.77%)	18% <0%> (-2%)
...lipse/kapua/kura/simulator/MqttAsyncTransport.java	52.77% <0%> (-2.78%)	0% <0%> (ø)
...e/kapua/broker/core/plugin/metric/LoginMetric.java	84.44% <0%> (-2.23%)	0% <0%> (ø)
.../broker/core/plugin/KapuaSecurityBrokerFilter.java	73.99% <0%> (-1.24%)	0% <0%> (ø)
...obDeviceManagementOperationManagerServiceImpl.java	87.5% <0%> (+2.5%)	16% <0%> (+1%)	⬆️
.../DeviceManagementOperationRegistryServiceImpl.java	72% <0%> (+4%)	14% <0%> (+2%)	⬆️
... and 1 more

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