RIA-7378 unlink case (#694)

* RIA-7552_appeal_can_proceed: Add Asylum case definition for Record out of time decision, Letter template, Letter generator and configuration, tests

* RIA-7378_unlink_appeal: refactor test method name

src/test/java/uk/gov/hmcts/reform/iacasedocumentsapi/domain/handlers/presubmit/letter/InternalMaintainCaseLinksGeneratorTest.java

@@ -52,7 +52,7 @@ void setUp() {
     }
 
     @Test
-    void should_create_internal_detained_end_appeal_pdf_and_append_to_notifications_documents() {
+    void should_create_internal_detained_maintain_case_links_pdf_and_append_to_notifications_documents() {
         when(callback.getCaseDetails()).thenReturn(caseDetails);
         when(callback.getEvent()).thenReturn(Event.MAINTAIN_CASE_LINKS);
         when(caseDetails.getCaseData()).thenReturn(asylumCase);