Change docstring location and learning hyperparams for object detection

[jaegukhyun]

Summary

This PR is for changing learning hyperparameters of object detection recipes.
Furthermore this PR also changes some wrong docstring location

How to test

Checklist

• I have added unit tests to cover my changes.​
• I have added integration tests to cover my changes.​
• I have added e2e tests for validation.
• I have added the description of my changes into CHANGELOG in my target branch (e.g., CHANGELOG in develop).​
• I have updated the documentation in my target branch accordingly (e.g., documentation in develop).
• I have linked related issues.

License

• I submit my code changes under the same Apache License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below).

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

[harimkang]

I think we need to select one of options
[option1]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
"""~~~~~"""

[option2]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

"""~~~~~"""

[option3]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
#
"""~~~~~"""

This may not seem like a big deal, but it's something that needs to be taken into account to make our code look neat.
Of course, it doesn't have to be resolved in this PR. I just want to hear your thoughts.

[samet-akcay]

I think we need to select one of options [option1]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
"""~~~~~"""

[option2]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

"""~~~~~"""

[option3]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
#
"""~~~~~"""

This may not seem like a big deal, but it's something that needs to be taken into account to make our code look neat. Of course, it doesn't have to be resolved in this PR. I just want to hear your thoughts.

I agree, we need a PR to fix all the docstring and license headers. We will then need to stick to it not to break consistency.

I would personally prefer the following:

"""Docstring Title Here.

Here is some docstring explanation. 
This part will be used within the documentation.
"""

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

from package1 import module1
import library
...

[jaegukhyun]

I think we need to select one of options [option1]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
"""~~~~~"""

[option2]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

"""~~~~~"""

[option3]

# Copyright (C) 2023 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
#
"""~~~~~"""

This may not seem like a big deal, but it's something that needs to be taken into account to make our code look neat. Of course, it doesn't have to be resolved in this PR. I just want to hear your thoughts.

I prefer @samet-akcay's option which is docstring before License.
If I have to choose option from your suggestion then I would prefer option 1, and I think current v2 branch follow option 1