[BUG] Parameter name of `DeepSpeedCPUAdam` optimizer

[mypydl]

Describe the bug The name of the first parameter of DeepSpeedCPUAdam is different from that of other optimizers. It's model_params. But in the other optimizers, they are all params. When I pass parameters with keywords, it causes trouble. I have to change the key to use DeepSpeedCPUAdam.

Expected behavior Replace model_params with params.

[loadams]

@mypydl - this also looks to be set for cpu_adagrad and cpu_lion.