fix config. wrong indentation and typos

[1Konny]

1. yaml.parser.ParserError caused by incorrect indentation in e2e_faster_rcnn_X-101-64x4d-FPN_1x.yaml

COMMAND:

python tools/test_net.py --dataset coco2017 --cfg configs/baselines/e2e_faster_rcnn_X-101-64x4d-FPN_1x.yaml --load_detectron /path/to/weights/e2e_faster_rcnn_X-101-64x4d-FPN_1x.pkl

ERROR :

"expected <block end>, but found %r" % token.id, token.start_mark)
yaml.parser.ParserError: while parsing a block mapping
  in "configs/baselines/e2e_faster_rcnn_X-101-64x4d-FPN_1x.yaml", line 1, column 1
expected <block end>, but found '<block mapping start>'
  in "configs/baselines/e2e_faster_rcnn_X-101-64x4d-FPN_1x.yaml", line 20, column 3

2. ModuleNotFoundError: No module named 'modeling.head_builder'
   COMMAND :

python tools/test_net.py --dataset keypoints_coco2017 --cfg configs/baselines/e2e_keypoint_rcnn_R-101-FPN_s1x.yaml --load_detectron weights/detectron_models_weights/e2e_keypoint_rcnn_R-10
1-FPN_s1x.pkl

ERROR:

creating index...
index created!
ERROR model_builder.py:  42: Failed to find function: head_builder.roi_2mlp_head
Traceback (most recent call last):
  File "tools/test_net.py", line 112, in <module>
    check_expected_results=True)
  File "/hdd2/codes/Detectron.pytorch/lib/core/test_engine.py", line 128, in run_inference
    all_results = result_getter()
  File "/hdd2/codes/Detectron.pytorch/lib/core/test_engine.py", line 108, in result_getter
    multi_gpu=multi_gpu_testing
  File "/hdd2/codes/Detectron.pytorch/lib/core/test_engine.py", line 158, in test_net_on_dataset
    args, dataset_name, proposal_file, output_dir, gpu_id=gpu_id
  File "/hdd2/codes/Detectron.pytorch/lib/core/test_engine.py", line 232, in test_net
    model = initialize_model_from_cfg(args, gpu_id=gpu_id)
  File "/hdd2/codes/Detectron.pytorch/lib/core/test_engine.py", line 322, in initialize_model_from_cfg
    model = model_builder.Generalized_RCNN()
  File "/hdd2/codes/Detectron.pytorch/lib/modeling/model_builder.py", line 103, in __init__
    self.Box_Head = get_func(cfg.FAST_RCNN.ROI_BOX_HEAD)(
  File "/hdd2/codes/Detectron.pytorch/lib/modeling/model_builder.py", line 39, in get_func
    module = importlib.import_module(module_name)
  File "/home/wonkonge/anaconda3/envs/detectron/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 953, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'modeling.head_builder'