Rename injection points used in AIO tests

The format of the injection point names used by the AIO code does not
match the existing naming convention used everywhere else in the code,
so let's be consistent.  These points are used in test_aio.

Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Discussion: https://postgr.es/m/Z_yTB80bdu1sYDqJ@paquier.xyz

src/backend/storage/aio/aio.c

@@ -507,7 +507,7 @@ pgaio_io_process_completion(PgAioHandle *ioh, int result)
 
 	pgaio_io_update_state(ioh, PGAIO_HS_COMPLETED_IO);
 
-	pgaio_io_call_inj(ioh, "AIO_PROCESS_COMPLETION_BEFORE_SHARED");
+	pgaio_io_call_inj(ioh, "aio-process-completion-before-shared");
 
 	pgaio_io_call_complete_shared(ioh);
 

src/backend/storage/aio/method_worker.c

@@ -525,7 +525,7 @@ IoWorkerMain(const void *startup_data, size_t startup_data_len)
 			 * To be able to exercise the reopen-fails path, allow injection
 			 * points to trigger a failure at this point.
 			 */
-			pgaio_io_call_inj(ioh, "AIO_WORKER_AFTER_REOPEN");
+			pgaio_io_call_inj(ioh, "aio-worker-after-reopen");
 
 			error_errno = 0;
 			error_ioh = NULL;

src/test/modules/test_aio/test_aio.c

@@ -86,19 +86,19 @@ test_aio_shmem_startup(void)
 		inj_io_error_state->enabled_reopen = false;
 
 #ifdef USE_INJECTION_POINTS
-		InjectionPointAttach("AIO_PROCESS_COMPLETION_BEFORE_SHARED",
+		InjectionPointAttach("aio-process-completion-before-shared",
 							 "test_aio",
 							 "inj_io_short_read",
 							 NULL,
 							 0);
-		InjectionPointLoad("AIO_PROCESS_COMPLETION_BEFORE_SHARED");
+		InjectionPointLoad("aio-process-completion-before-shared");
 
-		InjectionPointAttach("AIO_WORKER_AFTER_REOPEN",
+		InjectionPointAttach("aio-worker-after-reopen",
 							 "test_aio",
 							 "inj_io_reopen",
 							 NULL,
 							 0);
-		InjectionPointLoad("AIO_WORKER_AFTER_REOPEN");
+		InjectionPointLoad("aio-worker-after-reopen");
 
 #endif
 	}
@@ -109,8 +109,8 @@ test_aio_shmem_startup(void)
 		 * critical section.
 		 */
 #ifdef USE_INJECTION_POINTS
-		InjectionPointLoad("AIO_PROCESS_COMPLETION_BEFORE_SHARED");
-		InjectionPointLoad("AIO_WORKER_AFTER_REOPEN");
+		InjectionPointLoad("aio-process-completion-before-shared");
+		InjectionPointLoad("aio-worker-after-reopen");
 		elog(LOG, "injection point loaded");
 #endif
 	}