gstlal_inj_frames, gstlal_shift_frames: update async -> async_ in elem properties

gstlal-ugly/bin/gstlal_inj_frames

@@ -283,7 +283,7 @@ mux = pipeparts.mkprogressreport(pipeline, mux, name = "multiplexer")
 # ALSO note: if they are not exactly correct, the system complains that it cannot write to
 # the shared memory.
 
-pipeparts.mkgeneric(pipeline, mux, "gds_lvshmsink", shm_name = options.shared_memory_write, num_buffers=options.num_buffers, blocksize=options.blocksize, buffer_mode=2, sync=0, async=0)
+pipeparts.mkgeneric(pipeline, mux, "gds_lvshmsink", shm_name = options.shared_memory_write, num_buffers=options.num_buffers, blocksize=options.blocksize, buffer_mode=2, sync=0, async_=0)
 
 if options.write_pipeline is not None and "GST_DEBUG_DUMP_DOT_DIR" in os.environ:
         pipeparts.write_dump_dot(pipeline, "%s.%s" %(options.write_pipeline, "NULL"), verbose = options.verbose)

gstlal-ugly/bin/gstlal_shift_frames

@@ -152,7 +152,7 @@ mux = pipeparts.mkprogressreport(pipeline, mux, name = "multiplexer")
 # ALSO note: if they are not exactly correct, the system complains that it cannot write to
 # the shared memory.
 
-pipeparts.mkgeneric(pipeline, mux, "gds_lvshmsink", shm_name = options.shared_memory_write, num_buffers=options.num_buffers, blocksize=options.blocksize, buffer_mode=2, sync=0, async=0)
+pipeparts.mkgeneric(pipeline, mux, "gds_lvshmsink", shm_name = options.shared_memory_write, num_buffers=options.num_buffers, blocksize=options.blocksize, buffer_mode=2, sync=0, async_=0)
 
 if options.write_pipeline is not None and "GST_DEBUG_DUMP_DOT_DIR" in os.environ:
         pipeparts.write_dump_dot(pipeline, "%s.%s" %(options.write_pipeline, "NULL"), verbose = options.verbose)