Ensure that verbs occur only once in the collection

This is necessary for equals to work correctly

scm-core/src/test/java/sonia/scm/repository/RepositoryPermissionTest.java

@@ -46,4 +46,13 @@ class RepositoryPermissionTest {
 
     assertThat(permission1).isNotEqualTo(permission2);
   }
+
+  @Test
+  void shouldBeEqualWithRedundantVerbs() {
+    RepositoryPermission permission1 = new RepositoryPermission("name1", asList("one", "two"), false);
+    RepositoryPermission permission2 = new RepositoryPermission("name1", asList("one", "two"), false);
+    permission2.setVerbs(asList("one", "two", "two"));
+
+    assertThat(permission1).isEqualTo(permission2);
+  }
 }