Kerastuner-tensorboard-logger

(5) change session name format as follows:

from: {exectution time}-{trial ID}
to: {trial ID}
execution time in name is confusing.

use keras-tuner trial_id as session groups name in tensorboard hparams plugin

the followings is displayed as session name in tensorboard:

`{trial execution time}-{keras-tuner trial_id}`: e.g. `0h20m30s-gel21vgao7apklhp45`

Add `setup_tb`, write `summary_config` for tensorboard hparams to be able to recognize hyperparameter more accurately.
This converts keras-tuner hp into tensorboard hparams api, then write `summary_config`.

Support:
- `kerastuner.engine.hyperparameters.Int`: converted into `hp.IntInterval`
- `kerastuner.engine.hyperparameters.Choice`: converted into `hp.Discrete`
- `kerastuner.engine.hyperparameters.Float`: converted into `hp.RealInterval`
- `kerastuner.engine.hyperparameters.Boolean`: converted into `hp.Discrete`, values=(True, False)