Move trickle to the end: it takes a while, and its less important (in the face of failures)

tools/run_tests/run_microbenchmark.py

@@ -199,8 +199,7 @@ argp.add_argument('-c', '--collect',
                   default=sorted(collectors.keys()),
                   help='Which collectors should be run against each benchmark')
 argp.add_argument('-b', '--benchmarks',
-                  default=['bm_fullstack_trickle',
-                           'bm_fullstack_unary_ping_pong',
+                  default=['bm_fullstack_unary_ping_pong',
                            'bm_fullstack_streaming_ping_pong',
                            'bm_fullstack_streaming_pump',
                            'bm_closure',
@@ -208,7 +207,9 @@ argp.add_argument('-b', '--benchmarks',
                            'bm_call_create',
                            'bm_error',
                            'bm_chttp2_hpack',
-                           'bm_metadata'],
+                           'bm_metadata',
+                           'bm_fullstack_trickle',
+                           ],
                   nargs='+',
                   type=str,
                   help='Which microbenchmarks should be run')