fix: service copy without default template

[0utplay]

Motivation

When copying a service without providing a template we try to fallback to the "/default" template. But our fallback logic is not working correctly and causing an NPE.

Modification

We now only accept a single service when copying. If no default template exists and no template is provided we respond with an message indicating the missing template.

Result

The service <Service> copy Command is working again.

Other context

Fixes #1550

[github-actions]

Test Results

 48 files  ±0   48 suites  ±0   1m 40s ⏱️ -1s
420 tests ±0  420 ✅ ±0  0 💤 ±0  0 ❌ ±0 
751 runs  ±0  751 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 119bb58. ± Comparison against base commit 71fa7ca.

This pull request removes 38 and adds 38 tests. Note that renamed tests count towards both.

eu.cloudnetservice.driver.document.DocumentSerialisationTest ‑ [4] {"b":1,"s":2,"i":3,"l":4,"f":5.0,"d":6.0,"c":"/","string":"Hello, World!","bol":true,"cloud":["Ben?","Yes","No","HoHoHoHo"],"world":{"this":"is","insane":"!","hello":"world"}}, PRETTY
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [14] 2024-11-14
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [23] 21:07:49.656861592
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [28] 21:07:49.657013826Z
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [29] 21:07:49.657040606Z
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [30] 21:07:49.657064681+05:00
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [31] 21:07:49.657090860-03:00
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [34] 2024-11-14T21:07:49.657112751
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [39] 2024-11-14T21:07:49.660735619Z
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [4] 2024-11-14T21:07:49.656690372Z
…

eu.cloudnetservice.driver.document.DocumentSerialisationTest ‑ [4] {"b":1,"s":2,"i":3,"l":4,"f":5.0,"d":6.0,"c":"/","string":"Hello, World!","bol":true,"cloud":["Ben?","Yes","No","HoHoHoHo"],"world":{"this":"is","hello":"world","insane":"!"}}, PRETTY
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [14] 2024-12-20
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [23] 19:17:53.739647210
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [28] 19:17:53.739799192Z
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [29] 19:17:53.739826442Z
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [30] 19:17:53.739854144+05:00
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [31] 19:17:53.739880112-03:00
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [34] 2024-12-20T19:17:53.739901812
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [39] 2024-12-20T19:17:53.740038956Z
eu.cloudnetservice.driver.document.gson.JavaTimeSerializerTest ‑ [4] 2024-12-20T19:17:53.739531606Z
…

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