Adding framerate control for Vimba v6

[MikoMikarro]

No description provided.

[icolwell-as]

Thanks @MikoMikarro for the PR! Can you provide some more context and details in the PR description?
For example:

• Why is this new parameter needed?
• What problem did you run into that this is solving?
• What camera hardware are you using?

[MikoMikarro]

Hi, we added the new name for the frame parameter that was added with the last firmware, this fixes some of the problems related to issue #86 . Without this change in the parameter name, we couldn't change the camera's frame rate. I've also left uncommented the last name so it should work without any problem in the previous and current firmware.

I've also added the parameter that allows to use free run or fix the framerate.

Our team is using the G-201 camera: https://www.alliedvision.com/en/camera-selector/detail/manta/g-201/

[icolwell-as]

Thanks for the details! these change make sense to me, just a small nitpick on the formatting.

Thanks again for taking the time to submit a PR!

[shan-as]

Have not tested on a camera